Python rest_framework.serializers.py() Examples

The following are 3 code examples of rest_framework.serializers.py(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module rest_framework.serializers , or try the search function .
Example #1
Source File: serializers.py    From course-discovery with GNU Affero General Public License v3.0 6 votes vote down vote up 
def get_fields(self):
        """ Return the field_mapping needed for serializing the data."""
        # Re-implement the logic from the superclass methods, but make sure to handle field and query facets properly.
        # https://github.com/edx/course-discovery/blob/master/course_discovery/apps/api/serializers.py#L950
        # https://github.com/inonit/drf-haystack/blob/master/drf_haystack/serializers.py#L373
        field_data = self.instance.pop('fields', {})
        query_data = self.format_query_facet_data(self.instance.pop('queries', {}))
        field_mapping = super(DistinctCountsAggregateFacetSearchSerializer, self).get_fields()

        field_mapping['fields'] = FacetDictField(
            child=FacetListField(child=DistinctCountsFacetFieldSerializer(field_data), required=False)
        )

        field_mapping['queries'] = DictField(
            query_data, child=DistinctCountsQueryFacetFieldSerializer(), required=False
        )

        if self.serialize_objects:
            field_mapping.move_to_end('objects')

        self.instance['fields'] = field_data
        self.instance['queries'] = query_data
        return field_mapping
Example #2
Source File: serializers.py    From course-discovery with GNU Affero General Public License v3.0 6 votes vote down vote up 
def format_query_facet_data(self, query_facet_counts):
        """ Format and return the query facet data so that it may be properly serialized."""
        # Re-implement the logic from the superclass method, but make sure to handle changes to the raw query facet
        # data and extract the distinct counts.
        # https://github.com/edx/course-discovery/blob/master/course_discovery/apps/api/serializers.py#L966
        query_data = {}
        for field, options in getattr(self.Meta, 'field_queries', {}).items():
            # The query facet data is expected to be formatted as a dictionary with fields mapping to a two-tuple
            # containing count and distinct count.
            count, distinct_count = query_facet_counts.get(field, (0, 0))
            if count:
                query_data[field] = {
                    'field': field,
                    'options': options,
                    'count': count,
                    'distinct_count': distinct_count,
                }
        return query_data
Example #3
Source File: serializers.py    From course-discovery with GNU Affero General Public License v3.0 5 votes vote down vote up 
def get_distinct_count(self, instance):
        """ Return the distinct count for this facet."""
        # The instance is expected to be formatted as a three tuple containing the field name, normal count and
        # distinct count. This is consistent with the superclass implementation here:
        # https://github.com/inonit/drf-haystack/blob/master/drf_haystack/serializers.py#L321
        count = instance[2]
        return serializers.IntegerField(read_only=True).to_representation(count)