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[英]Difference between django.core serializers and Django Rest Framework serializers
[英]Mixin common fields between serializers in Django Rest Framework
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,它是通用的,即对所有类型的字符都是通用的。
我希望我的Mage Serializer能够在所有类型的角色之间使用'混合'而不是c / p(Mage是一种角色),希望这会增加我的webapp中的DRY。
问题在于我有这个模型:
class NWODCharacter(models.Model):
class Meta:
abstract = True
ordering = ['updated_date', 'created_date']
name = models.CharField(max_length=200)
player = models.ForeignKey('auth.User', related_name="%(class)s_by_user")
....
def save(self, *args, **kwargs):
...
attributes = GenericRelation('CharacterAttributeLink')
skills = GenericRelation('CharacterSkillLink')
这意味着我收到此错误:
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通用关系。
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拖入混合中?
解决方案很简单
class GenericCharacterFieldMixin():
至
class GenericCharacterFieldMixin(serializers.Serializer):
我有同样的问题,我的谷歌搜索把我带到了这里。 我设法解决了它。 由于您在序列化程序中包含属性和技能字段,因此需要为其提供序列化方法。
这对我有用
class MageSerializer(GenericCharacterFieldMixin, serializers.ModelSerializer):
player = serializers.ReadOnlyField(source='player.username')
arcana = serializers.SerializerMethodField()
attributes = serializers.PrimaryKeyRelatedField(many=True,
read_only= True)
skills = serializers.PrimaryKeyRelatedField(many=True,
read_only= True)
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
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