Django Rest Fram中序列化程序之间的公共字段混合

Question

我有这个：

class GenericCharacterFieldMixin():
    attributes = serializers.SerializerMethodField('character_attribute')
    skills = serializers.SerializerMethodField('character_skill')

    def character_attribute(self, obj):
        character_attribute_fields = {}
        character_attribute_fields['mental'] = {str(trait_item.get()): trait_item.get().current_value
                                                for trait_item in obj.mental_attributes}
        character_attribute_fields['physical'] = {str(trait_item.get()): trait_item.get().current_value
                                                  for trait_item in obj.physical_attributes}
        character_attribute_fields['social'] = {str(trait_item.get()): trait_item.get().current_value
                                                for trait_item in obj.social_attributes}
        return character_attribute_fields

    def character_skill(self, obj):
        character_skill_fields = {}
        character_skill_fields['mental'] = {str(trait_item.get()): trait_item.get().current_value
                                            for trait_item in obj.mental_skills}
        character_skill_fields['physical'] = {str(trait_item.get()): trait_item.get().current_value
                                              for trait_item in obj.physical_skills}
        character_skill_fields['social'] = {str(trait_item.get()): trait_item.get().current_value
                                            for trait_item in obj.social_skills}
        return character_skill_fields


class MageSerializer(GenericCharacterFieldMixin, serializers.ModelSerializer):
    player = serializers.ReadOnlyField(source='player.username')
    arcana = serializers.SerializerMethodField()

    def get_arcana(self, obj):
        if obj:
            return {str(arcana): arcana.current_value for arcana in obj.linked_arcana.all()}

    class Meta:
        model = Mage
        fields = ('id', 'player', 'name', 'sub_race', 'faction', 'is_published',
                  'power_level', 'energy_trait', 'virtue', 'vice', 'morality', 'size',
                  'arcana', 'attributes', 'skills')
        depth = 1

GenericCharacterFieldMixin是字符字段的混合体，这些字符是通用的，即所有类型的字符都是通用的。在

我希望我的法师序列化程序有这些'混合'而不是c/p然后在所有类型的字符（法师是一种字符类型）希望这将增加我的网络应用程序干燥。在

问题出在车型上我有这个：

^{pr2}$

这意味着我得到了这个错误：

TypeError at /characters/api/mages
<django.contrib.contenttypes.fields.create_generic_related_manager.<locals>.GenericRelatedObjectManager object at 0x00000000051CBD30> is not JSON serializable

Django Rest Framework认为我想序列化我的泛型关系。

如果我重命名模型中的字段（s/attributes/foos/g，s/skills/bars/g），那么我得到一个不同的（不太清楚？）错误：

ImproperlyConfigured at /characters/api/mages
Field name `attributes` is not valid for model `ModelBase`.

如何在不混淆DRF的情况下将这些方法和字段拉入mixin？在

Answer 1

解决办法很简单，就是改变

class GenericCharacterFieldMixin():

到

^{pr2}$