Python django.db.models.NullBooleanField() Examples

def display_for_field(value, field):
    from django.contrib.admin.templatetags.admin_list import _boolean_icon
    from django.contrib.admin.views.main import EMPTY_CHANGELIST_VALUE

    if field.flatchoices:
        return dict(field.flatchoices).get(value, EMPTY_CHANGELIST_VALUE)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return _boolean_icon(value)
    elif value is None:
        return EMPTY_CHANGELIST_VALUE
    elif isinstance(field, models.DateTimeField):
        return formats.localize(timezone.template_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, models.FloatField):
        return formats.number_format(value)
    elif isinstance(field, models.FileField) and value:
        return format_html('<a href="{}">{}</a>', value.url, value)
    else:
        return smart_text(value) 

def choices(self):
        for lookup, title in (
                ('', _('All')),
                ('1', _('Yes')),
                ('0', _('No'))):
            yield {
                'selected': self.lookup_exact_val == lookup and not self.lookup_isnull_val,
                'query_string': self.query_string({
                self.lookup_exact_name: lookup,
                }, [self.lookup_isnull_name]),
                'display': title,
            }
        if isinstance(self.field, models.NullBooleanField):
            yield {
                'selected': self.lookup_isnull_val == 'True',
                'query_string': self.query_string({
                self.lookup_isnull_name: 'True',
                }, [self.lookup_exact_name]),
                'display': _('Unknown'),
            } 

def choices(self, cl):
        for lookup, title in (
                (None, _('All')),
                ('1', _('Yes')),
                ('0', _('No'))):
            yield {
                'selected': self.lookup_val == lookup and not self.lookup_val2,
                'query_string': cl.get_query_string({
                    self.lookup_kwarg: lookup,
                }, [self.lookup_kwarg2]),
                'display': title,
            }
        if isinstance(self.field, models.NullBooleanField):
            yield {
                'selected': self.lookup_val2 == 'True',
                'query_string': cl.get_query_string({
                    self.lookup_kwarg2: 'True',
                }, [self.lookup_kwarg]),
                'display': _('Unknown'),
            } 

def display_for_field(value, field, empty_value_display):
    from django.contrib.admin.templatetags.admin_list import _boolean_icon

    if field.flatchoices:
        return dict(field.flatchoices).get(value, empty_value_display)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return _boolean_icon(value)
    elif value is None:
        return empty_value_display
    elif isinstance(field, models.DateTimeField):
        return formats.localize(timezone.template_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, (models.IntegerField, models.FloatField)):
        return formats.number_format(value)
    elif isinstance(field, models.FileField) and value:
        return format_html('<a href="{}">{}</a>', value.url, value)
    else:
        return smart_text(value) 

def display_for_field(value, field):
    from xadmin.views.list import EMPTY_CHANGELIST_VALUE

    if field.flatchoices:
        return dict(field.flatchoices).get(value, EMPTY_CHANGELIST_VALUE)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return boolean_icon(value)
    elif value is None:
        return EMPTY_CHANGELIST_VALUE
    elif isinstance(field, models.DateTimeField):
        return formats.localize(tz_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, models.FloatField):
        return formats.number_format(value)
    elif isinstance(field.remote_field, models.ManyToManyRel):
        return ', '.join([smart_text(obj) for obj in value.all()])
    else:
        return smart_text(value) 

def display_for_field(value, field, empty_value_display):
    from django.contrib.admin.templatetags.admin_list import _boolean_icon

    if getattr(field, 'flatchoices', None):
        return dict(field.flatchoices).get(value, empty_value_display)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return _boolean_icon(value)
    elif value is None:
        return empty_value_display
    elif isinstance(field, models.DateTimeField):
        return formats.localize(timezone.template_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, (models.IntegerField, models.FloatField)):
        return formats.number_format(value)
    elif isinstance(field, models.FileField) and value:
        return format_html('<a href="{}">{}</a>', value.url, value)
    else:
        return display_for_value(value, empty_value_display) 

def display_for_field(value, field):
    from xadmin.views.list import EMPTY_CHANGELIST_VALUE

    if field.flatchoices:
        return dict(field.flatchoices).get(value, EMPTY_CHANGELIST_VALUE)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return boolean_icon(value)
    elif value is None:
        return EMPTY_CHANGELIST_VALUE
    elif isinstance(field, models.DateTimeField):
        return formats.localize(tz_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, models.FloatField):
        return formats.number_format(value)
    elif isinstance(field.remote_field, models.ManyToManyRel):
        return ', '.join([smart_text(obj) for obj in value.all()])
    else:
        return smart_text(value) 

def choices(self, changelist):
        for lookup, title in (
                (None, _('All')),
                ('1', _('Yes')),
                ('0', _('No'))):
            yield {
                'selected': self.lookup_val == lookup and not self.lookup_val2,
                'query_string': changelist.get_query_string({
                    self.lookup_kwarg: lookup,
                }, [self.lookup_kwarg2]),
                'display': title,
            }
        if isinstance(self.field, models.NullBooleanField):
            yield {
                'selected': self.lookup_val2 == 'True',
                'query_string': changelist.get_query_string({
                    self.lookup_kwarg2: 'True',
                }, [self.lookup_kwarg]),
                'display': _('Unknown'),
            } 

def choices(self, changelist):
        for lookup, title in (
                (None, _('All')),
                ('1', _('Yes')),
                ('0', _('No'))):
            yield {
                'selected': self.lookup_val == lookup and not self.lookup_val2,
                'query_string': changelist.get_query_string({
                    self.lookup_kwarg: lookup,
                }, [self.lookup_kwarg2]),
                'display': title,
            }
        if isinstance(self.field, models.NullBooleanField):
            yield {
                'selected': self.lookup_val2 == 'True',
                'query_string': changelist.get_query_string({
                    self.lookup_kwarg2: 'True',
                }, [self.lookup_kwarg]),
                'display': _('Unknown'),
            } 

def display_for_field(value, field, empty_value_display):
    from django.contrib.admin.templatetags.admin_list import _boolean_icon

    if getattr(field, 'flatchoices', None):
        return dict(field.flatchoices).get(value, empty_value_display)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return _boolean_icon(value)
    elif value is None:
        return empty_value_display
    elif isinstance(field, models.DateTimeField):
        return formats.localize(timezone.template_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, (models.IntegerField, models.FloatField)):
        return formats.number_format(value)
    elif isinstance(field, models.FileField) and value:
        return format_html('<a href="{}">{}</a>', value.url, value)
    else:
        return display_for_value(value, empty_value_display) 

def display_for_field(value, field):
    from xadmin.views.list import EMPTY_CHANGELIST_VALUE

    if field.flatchoices:
        return dict(field.flatchoices).get(value, EMPTY_CHANGELIST_VALUE)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return boolean_icon(value)
    elif value is None:
        return EMPTY_CHANGELIST_VALUE
    elif isinstance(field, models.DateTimeField):
        return formats.localize(tz_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, models.FloatField):
        return formats.number_format(value)
    elif isinstance(field.remote_field, models.ManyToManyRel):
        return ', '.join([smart_text(obj) for obj in value.all()])
    else:
        return smart_text(value) 

def document_field(field):
    """
    The default ``field_factory`` method for converting Django field instances to ``elasticsearch_dsl.Field`` instances.
    Auto-created fields (primary keys, for example) and one-to-many fields (reverse FK relationships) are skipped.
    """
    if field.auto_created or field.one_to_many:
        return None
    if field.many_to_many:
        return RawMultiString
    defaults = {
        models.DateField: dsl.Date(),
        models.DateTimeField: dsl.Date(),
        models.IntegerField: dsl.Long(),
        models.PositiveIntegerField: dsl.Long(),
        models.BooleanField: dsl.Boolean(),
        models.NullBooleanField: dsl.Boolean(),
        models.SlugField: dsl.String(index='not_analyzed'),
        models.DecimalField: dsl.Double(),
        models.FloatField: dsl.Float(),
    }
    return defaults.get(field.__class__, RawString) 

def display_for_field(value, field):
    from xadmin.views.list import EMPTY_CHANGELIST_VALUE

    if field.flatchoices:
        return dict(field.flatchoices).get(value, EMPTY_CHANGELIST_VALUE)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return boolean_icon(value)
    elif value is None:
        return EMPTY_CHANGELIST_VALUE
    elif isinstance(field, models.DateTimeField):
        return formats.localize(tz_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, models.FloatField):
        return formats.number_format(value)
    elif isinstance(field.rel, models.ManyToManyRel):
        return ', '.join([smart_text(obj) for obj in value.all()])
    else:
        return smart_text(value) 

def display_for_field(value, field, empty_value_display):
    from django.contrib.admin.templatetags.admin_list import _boolean_icon

    if getattr(field, 'flatchoices', None):
        return dict(field.flatchoices).get(value, empty_value_display)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, (models.BooleanField, models.NullBooleanField)):
        return _boolean_icon(value)
    elif value is None:
        return empty_value_display
    elif isinstance(field, models.DateTimeField):
        return formats.localize(timezone.template_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, (models.IntegerField, models.FloatField)):
        return formats.number_format(value)
    elif isinstance(field, models.FileField) and value:
        return format_html('<a href="{}">{}</a>', value.url, value)
    else:
        return display_for_value(value, empty_value_display) 

def choices(self, changelist):
        for lookup, title in (
                (None, _('All')),
                ('1', _('Yes')),
                ('0', _('No'))):
            yield {
                'selected': self.lookup_val == lookup and not self.lookup_val2,
                'query_string': changelist.get_query_string({
                    self.lookup_kwarg: lookup,
                }, [self.lookup_kwarg2]),
                'display': title,
            }
        if isinstance(self.field, models.NullBooleanField):
            yield {
                'selected': self.lookup_val2 == 'True',
                'query_string': changelist.get_query_string({
                    self.lookup_kwarg2: 'True',
                }, [self.lookup_kwarg]),
                'display': _('Unknown'),
            } 

def choices(self, cl):
        for lookup, title in (
                (None, _('All')),
                ('1', _('Yes')),
                ('0', _('No'))):
            yield {
                'selected': self.lookup_val == lookup and not self.lookup_val2,
                'query_string': cl.get_query_string({
                    self.lookup_kwarg: lookup,
                }, [self.lookup_kwarg2]),
                'display': title,
            }
        if isinstance(self.field, models.NullBooleanField):
            yield {
                'selected': self.lookup_val2 == 'True',
                'query_string': cl.get_query_string({
                    self.lookup_kwarg2: 'True',
                }, [self.lookup_kwarg]),
                'display': _('Unknown'),
            } 

def display_for_field(value, field):
    from xadmin.views.list import EMPTY_CHANGELIST_VALUE

    if field.flatchoices:
        return dict(field.flatchoices).get(value, EMPTY_CHANGELIST_VALUE)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return boolean_icon(value)
    elif value is None:
        return EMPTY_CHANGELIST_VALUE
    elif isinstance(field, models.DateTimeField):
        return formats.localize(tz_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, models.FloatField):
        return formats.number_format(value)
    elif isinstance(field, models.FileField) and value:
        return format_html('<a href="{}">{}</a>', value.url, value)
    else:
        return smart_text(value) 

def choices(self):
        for lookup, title in (
                ('', _('All')),
                ('1', _('Yes')),
                ('0', _('No'))):
            yield {
                'selected': self.lookup_exact_val == lookup and not self.lookup_isnull_val,
                'query_string': self.query_string({
                self.lookup_exact_name: lookup,
                }, [self.lookup_isnull_name]),
                'display': title,
            }
        if isinstance(self.field, models.NullBooleanField):
            yield {
                'selected': self.lookup_isnull_val == 'True',
                'query_string': self.query_string({
                self.lookup_isnull_name: 'True',
                }, [self.lookup_exact_name]),
                'display': _('Unknown'),
            } 

def display_for_field(value, field):
    from xadmin.views.list import EMPTY_CHANGELIST_VALUE

    if field.flatchoices:
        return dict(field.flatchoices).get(value, EMPTY_CHANGELIST_VALUE)
    # NullBooleanField needs special-case null-handling, so it comes
    # before the general null test.
    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
        return boolean_icon(value)
    elif value is None:
        return EMPTY_CHANGELIST_VALUE
    elif isinstance(field, models.DateTimeField):
        return formats.localize(tz_localtime(value))
    elif isinstance(field, (models.DateField, models.TimeField)):
        return formats.localize(value)
    elif isinstance(field, models.DecimalField):
        return formats.number_format(value, field.decimal_places)
    elif isinstance(field, models.FloatField):
        return formats.number_format(value)
    elif isinstance(field.rel, models.ManyToManyRel):
        return ', '.join([smart_unicode(obj) for obj in value.all()])
    else:
        return smart_unicode(value) 

def test_null_boolean_field_raises_error_message(self):
        f = models.NullBooleanField()
        self._test_validation_messages(f, 'fõo', ["'fõo' value must be either None, True or False."]) 

def test_null_boolean_field(self):
        field = models.NullBooleanField()
        name, path, args, kwargs = field.deconstruct()
        self.assertEqual(path, "django.db.models.NullBooleanField")
        self.assertEqual(args, [])
        self.assertEqual(kwargs, {}) 

def test_nullbooleanfield_old_get_prep_value(self):
        self._test_get_prep_value(models.NullBooleanField()) 

def test_null_display_for_field(self):
        """
        Regression test for #12550: display_for_field should handle None
        value.
        """
        display_value = display_for_field(None, models.CharField(), self.empty_value)
        self.assertEqual(display_value, self.empty_value)

        display_value = display_for_field(None, models.CharField(
            choices=(
                (None, "test_none"),
            )
        ), self.empty_value)
        self.assertEqual(display_value, "test_none")

        display_value = display_for_field(None, models.DateField(), self.empty_value)
        self.assertEqual(display_value, self.empty_value)

        display_value = display_for_field(None, models.TimeField(), self.empty_value)
        self.assertEqual(display_value, self.empty_value)

        # Regression test for #13071: NullBooleanField has special
        # handling.
        display_value = display_for_field(None, models.NullBooleanField(), self.empty_value)
        expected = '<img src="%sadmin/img/icon-unknown.svg" alt="None">' % settings.STATIC_URL
        self.assertHTMLEqual(display_value, expected)

        display_value = display_for_field(None, models.BooleanField(null=True), self.empty_value)
        expected = '<img src="%sadmin/img/icon-unknown.svg" alt="None" />' % settings.STATIC_URL
        self.assertHTMLEqual(display_value, expected)

        display_value = display_for_field(None, models.DecimalField(), self.empty_value)
        self.assertEqual(display_value, self.empty_value)

        display_value = display_for_field(None, models.FloatField(), self.empty_value)
        self.assertEqual(display_value, self.empty_value) 

def test_nullbooleanfield_formfield(self):
        f = models.BooleanField(null=True)
        self.assertIsInstance(f.formfield(), forms.NullBooleanField)
        f = models.NullBooleanField()
        self.assertIsInstance(f.formfield(), forms.NullBooleanField) 

def deprecate_field(field_instance, return_instead=None):
    """
    Can be used in models to delete a Field in a Backwards compatible manner.
    The process for deleting old model Fields is:
    1. Mark a field as deprecated by wrapping the field with this function
    2. Wait until (1) is deployed to every relevant server/branch
    3. Delete the field from the model.

    For (1) and (3) you need to run ./manage.py makemigrations:
    :param field_instance: The field to deprecate
    :param return_instead: A value or function that
    the field will pretend to have
    """
    if not set(sys.argv) & {"makemigrations", "migrate", "showmigrations"}:
        return DeprecatedField(return_instead)

    if not type(field_instance) == BooleanField:
        field_instance.null = True
        return field_instance

    # A BooleanField does not allow null=True, so we need to cast
    # this to a NullBooleanField
    return NullBooleanField(
        help_text=field_instance.help_text,
        default=field_instance.default
    ) 

def _format_value(self, o):
        if (o.field is None and getattr(o.attr, 'boolean', False)) or \
           (o.field and isinstance(o.field, (BooleanField, NullBooleanField))):
                value = o.value
        elif str(o.text).startswith("<span class='text-muted'>"):
            value = escape(str(o.text)[25:-7])
        else:
            value = escape(str(o.text))
        return value 

def choices(self):
        for lookup, title in (
                ('', _('All')),
                ('1', _('Yes')),
                ('0', _('No')),
        ):
            yield {
                'selected': (
                    self.lookup_exact_val == lookup
                    and not self.lookup_isnull_val
                ),
                'query_string': self.query_string(
                    {self.lookup_exact_name: lookup},
                    [self.lookup_isnull_name],
                ),
                'display': title,
            }
        if isinstance(self.field, models.NullBooleanField):
            yield {
                'selected': self.lookup_isnull_val == 'True',
                'query_string': self.query_string(
                    {self.lookup_isnull_name: 'True'},
                    [self.lookup_exact_name],
                ),
                'display': _('Unknown'),
            } 

def test(cls, field, request, params, model, admin_view, field_path):
        return isinstance(field, (models.BooleanField, models.NullBooleanField)) 

def test_null_boolean_field(self):
        field = models.NullBooleanField()
        name, path, args, kwargs = field.deconstruct()
        self.assertEqual(path, "django.db.models.NullBooleanField")
        self.assertEqual(args, [])
        self.assertEqual(kwargs, {}) 

def _format_value(self, o):
        if (o.field is None and getattr(o.attr, 'boolean', False)) or \
           (o.field and isinstance(o.field, (BooleanField, NullBooleanField))):
                value = o.value
        elif str(o.text).startswith("<span class='text-muted'>"):
            value = escape(str(o.text)[25:-7])
        else:
            value = escape(str(o.text))
        return value