gistfile1.py

class CacheBooleanField(serializers.BooleanField):
    EXPIRES = 3600 * 24 * 30

    def field_from_native(self, data, files, field_name, into):
        result = super(CacheBooleanField, self).field_from_native(
            data, files, field_name, into
        )
        value = into.get(field_name, self.default)
        cache.set(self.get_key(), value, self.EXPIRES)
        return result

    def get_key(self, obj=None):
        request = self.context.get('request')
        if request is None:
            return

        if obj is None:
            obj = self.parent.object

        class_name = self.parent.__class__.__name__
        user_id = self.context.get('request').user.id
        obj_id = obj.id
        return '%s-%s-%s' % (class_name, obj_id, user_id)

    def field_to_native(self, obj, field_name):
        value = cache.get(self.get_key(obj), False)
        return self.to_native(value)