Python sqlalchemy.mapper.column_attrs() Examples

The following are code examples for showing how to use sqlalchemy.mapper.column_attrs(). They are extracted from open source Python projects. You can vote up the examples you like or vote down the ones you don't like. You can also save this page to your account.

Example 1
Project: Flask_Blog   Author: sugarguo   File: mutable.py    (GNU General Public License v3.0) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 2
Project: QXSConsolas   Author: qxsch   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 3
Project: flasky   Author: RoseOu   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 4
Project: oa_qian   Author: sunqb   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 5
Project: chihu   Author: yelongyu   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 6
Project: ShelbySearch   Author: Agentscreech   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 7
Project: pyetje   Author: rorlika   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 8
Project: Price-Comparator   Author: Thejas-1   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 9
Project: Flask-NvRay-Blog   Author: rui7157   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 10
Project: Flask-NvRay-Blog   Author: rui7157   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 11
Project: Callandtext   Author: iaora   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 12
Project: python_ddd_flask   Author: igorvinnicius   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 13
Project: webapp   Author: superchilli   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 14
Project: QualquerMerdaAPI   Author: tiagovizoto   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 15
Project: gardenbot   Author: GoestaO   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 16
Project: flask-zhenai-mongo-echarts   Author: Fretice   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 17
Project: Data-visualization   Author: insta-code1   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 18
Project: micro-blog   Author: nickChenyx   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 19
Project: python-flask-security   Author: weinbergdavid   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 20
Project: watcher   Author: nosmokingbandit   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 21
Project: Lixiang_zhaoxin   Author: hejaxian   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 22
Project: flask   Author: bobohope   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 23
Project: Chorus   Author: DonaldBough   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 24
Project: Hawkeye   Author: tozhengxq   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 25
Project: Alfred   Author: jkachhadia   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 26
Project: ngx_status   Author: YoYoAdorkable   File: mutable.py    (license) View Source Project 6 votes vote down vote up
def associate_with(cls, sqltype):
        """Associate this wrapper with all future mapped columns
        of the given type.

        This is a convenience method that calls
        ``associate_with_attribute`` automatically.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.associate_with` for types that are permanent to an
           application, not with ad-hoc types else this will cause unbounded
           growth in memory usage.

        """

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if isinstance(prop.columns[0].type, sqltype):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type) 
Example 27
Project: Flask_Blog   Author: sugarguo   File: mutable.py    (GNU General Public License v3.0) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 28
Project: QXSConsolas   Author: qxsch   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 29
Project: flasky   Author: RoseOu   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 30
Project: oa_qian   Author: sunqb   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 31
Project: chihu   Author: yelongyu   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 32
Project: ShelbySearch   Author: Agentscreech   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        # a SchemaType will be copied when the Column is copied,
        # and we'll lose our ability to link that type back to the original.
        # so track our original type w/ columns
        if isinstance(sqltype, SchemaEventTarget):
            @event.listens_for(sqltype, "before_parent_attach")
            def _add_column_memo(sqltyp, parent):
                parent.info['_ext_mutable_orig_type'] = sqltyp
            schema_event_check = True
        else:
            schema_event_check = False

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if (
                        schema_event_check and
                        hasattr(prop.expression, 'info') and
                        prop.expression.info.get('_ext_mutable_orig_type')
                        is sqltype
                ) or (
                    prop.columns[0].type is sqltype
                ):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 33
Project: pyetje   Author: rorlika   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :meth:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 34
Project: Price-Comparator   Author: Thejas-1   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 35
Project: Flask-NvRay-Blog   Author: rui7157   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 36
Project: Flask-NvRay-Blog   Author: rui7157   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 37
Project: Callandtext   Author: iaora   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 38
Project: python_ddd_flask   Author: igorvinnicius   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 39
Project: webapp   Author: superchilli   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 40
Project: QualquerMerdaAPI   Author: tiagovizoto   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        # a SchemaType will be copied when the Column is copied,
        # and we'll lose our ability to link that type back to the original.
        # so track our original type w/ columns
        if isinstance(sqltype, SchemaEventTarget):
            @event.listens_for(sqltype, "before_parent_attach")
            def _add_column_memo(sqltyp, parent):
                parent.info['_ext_mutable_orig_type'] = sqltyp
            schema_event_check = True
        else:
            schema_event_check = False

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if (
                        schema_event_check and
                        hasattr(prop.expression, 'info') and
                        prop.expression.info.get('_ext_mutable_orig_type')
                        is sqltype
                ) or (
                    prop.columns[0].type is sqltype
                ):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 41
Project: gardenbot   Author: GoestaO   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        # a SchemaType will be copied when the Column is copied,
        # and we'll lose our ability to link that type back to the original.
        # so track our original type w/ columns
        if isinstance(sqltype, SchemaEventTarget):
            @event.listens_for(sqltype, "before_parent_attach")
            def _add_column_memo(sqltyp, parent):
                parent.info['_ext_mutable_orig_type'] = sqltyp
            schema_event_check = True
        else:
            schema_event_check = False

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if (
                        schema_event_check and
                        hasattr(prop.expression, 'info') and
                        prop.expression.info.get('_ext_mutable_orig_type')
                        is sqltype
                ) or (
                    prop.columns[0].type is sqltype
                ):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 42
Project: flask-zhenai-mongo-echarts   Author: Fretice   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 43
Project: Data-visualization   Author: insta-code1   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 44
Project: micro-blog   Author: nickChenyx   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 45
Project: python-flask-security   Author: weinbergdavid   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 46
Project: watcher   Author: nosmokingbandit   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 47
Project: Lixiang_zhaoxin   Author: hejaxian   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 48
Project: flask   Author: bobohope   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        # a SchemaType will be copied when the Column is copied,
        # and we'll lose our ability to link that type back to the original.
        # so track our original type w/ columns
        if isinstance(sqltype, SchemaEventTarget):
            @event.listens_for(sqltype, "before_parent_attach")
            def _add_column_memo(sqltyp, parent):
                parent.info['_ext_mutable_orig_type'] = sqltyp
            schema_event_check = True
        else:
            schema_event_check = False

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if (
                        schema_event_check and
                        hasattr(prop.expression, 'info') and
                        prop.expression.info.get('_ext_mutable_orig_type')
                        is sqltype
                ) or (
                    prop.columns[0].type is sqltype
                ):
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 49
Project: Chorus   Author: DonaldBough   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype 
Example 50
Project: Hawkeye   Author: tozhengxq   File: mutable.py    (license) View Source Project 4 votes vote down vote up
def as_mutable(cls, sqltype):
        """Associate a SQL type with this mutable Python type.

        This establishes listeners that will detect ORM mappings against
        the given type, adding mutation event trackers to those mappings.

        The type is returned, unconditionally as an instance, so that
        :meth:`.as_mutable` can be used inline::

            Table('mytable', metadata,
                Column('id', Integer, primary_key=True),
                Column('data', MyMutableType.as_mutable(PickleType))
            )

        Note that the returned type is always an instance, even if a class
        is given, and that only columns which are declared specifically with
        that type instance receive additional instrumentation.

        To associate a particular mutable type with all occurrences of a
        particular type, use the :meth:`.Mutable.associate_with` classmethod
        of the particular :class:`.Mutable` subclass to establish a global
        association.

        .. warning::

           The listeners established by this method are *global*
           to all mappers, and are *not* garbage collected.   Only use
           :meth:`.as_mutable` for types that are permanent to an application,
           not with ad-hoc types else this will cause unbounded growth
           in memory usage.

        """
        sqltype = types.to_instance(sqltype)

        def listen_for_type(mapper, class_):
            for prop in mapper.column_attrs:
                if prop.columns[0].type is sqltype:
                    cls.associate_with_attribute(getattr(class_, prop.key))

        event.listen(mapper, 'mapper_configured', listen_for_type)

        return sqltype