DRF Serializer

serializer.py

class DynamicFieldsModelSerializer(serializers.ModelSerializer):
    """
    A ModelSerializer that takes an additional `fields` argument that
    controls which fields should be displayed.
    """

    def __init__(self, *args, **kwargs):
        # Don't pass the 'fields' arg up to the superclass
        fields = kwargs.pop('fields', None)

        # Instantiate the superclass normally
        super(DynamicFieldsModelSerializer, self).__init__(*args, **kwargs)

        if fields is not None:
            # Drop any fields that are not specified in the `fields` argument.
            allowed = set(fields)
            existing = set(self.fields.keys())
            for field_name in existing - allowed:
                self.fields.pop(field_name)


class CustomSerializerMixin(object):
    u"""
    在GenericAPIView的子类中使用的自定义序列化类Mixin,包括APIView ViewSet

    serializer_class: 在自定义序列化类字典中如果没有,则选择默认的serializer_class
    custom_serializer_classes: 自定义序列化类字典

    custom_serializer_classes = {
        "list": 列表
        "create": 创建
        "retrieve": 详情
        "update": 更新
        "destroy": 删除
    }
    """
    serializer_class = None
    custom_serializer_classes = {}

    def get_serializer_class(self):
        """ Return the class to use for serializer w.r.t to the request method."""

        if hasattr(self, 'action') and self.action in self.custom_serializer_classes:
            return self.custom_serializer_classes[self.action]
        return super(CustomSerializerMixin, self).get_serializer_class()


# http://stackoverflow.com/questions/17577177/creating-a-rest-api-for-a-django-application/37769847#37769847

from jsonschema import validate
from jsonschema.exceptions import ValidationError as JSONSchemaValidationError
from rest_framework import serializers


class JsonSchemeSerializer(serializers.BaseSerializer):
    u"""
    用于复杂json schema的验证, 只做反序列化, 不做序列化
    """
    SCHEMA = None

    def to_internal_value(self, data):
        try:
            validate(data, self.SCHEMA)
        except JSONSchemaValidationError as e:
            raise serializers.ValidationError(e.message)
        return data


def schema_factory(schema):
    u"""
    schema serializer factory
    """
    class Serializer(JsonSchemeSerializer):
        SCHEMA = schema
    return Serializer