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如何通过显式添加对象的字段在Django装置中添加关系?

django-fixtures django-serializer django-rest-framework django-models django

Junior Gantin · 技术社区 · 7 年前

class Component(models.Model):
    name = models.CharField(unique=True, max_length=255)
    component_properties = models.ManyToManyField(ComponentProperty)

class ComponentProperty(models.Model):
    label = models.CharField(unique=True, max_length=255)
    component_type = models.CharField(max_length=255)

和序列化程序:

class ComponentSerializer(serializers.ModelSerializer):
    class Meta:
        model = Component
        fields = ('name', 'component_properties')
        depth = 1

class ComponentPropertySerializer(serializers.ModelSerializer):
    class Meta:
        model = ComponentProperty
        fields = ('label', 'component_type')

[
   {
      "pk":1,
      "model":"api.componentproperty",
      "fields":{
         "label":"label",
         "component_type":"text"
      }
   },
   {
      "pk":2,
      "model":"api.componentproperty",
      "fields":{
         "label":"description",
         "component_type":"text",

      }
   },
   {
      "pk":1,
      "model":"api.component",
      "fields":{
         "name":"text",
         "component_properties":[
            1,
            2
         ]
      }
   }
]

干得好!但我有20个固定装置要装。我希望fixture(例如component.json)如下所示:

[
   {
      "pk":null,
      "model":"api.component",
      "fields":{
         "name":"text",
         "component_properties":[
            {
               "pk":null,
               "model":"api.componentproperty",
               "fields":{
                  "label":"label",
                  "component_type":"text"
               }
            },
            {
               "pk":null,
               "model":"api.componentproperty",
               "fields":{
                  "label":"description",
                  "component_type":"text",

               }
            }
         ]
      }
   }
]

here . 请问,有谁能帮我写这些没有pk的装置和上面描述的关系吗?

1 回复 | 直到 6 年前

wencakisa 7 年前

据我所知,你想表演属于 Component properties ComponentSerializer .

如果你使用你的 ComponentPropertySerializer :

class ComponentPropertySerializer(serializers.ModelSerializer):
    class Meta:
        model = ComponentProperty
        fields = ('label', 'component_type')


class ComponentSerializer(serializers.ModelSerializer):
    # Django REST Framework supports nested serialization
    # You serialize your *component_properties* with your ComponentPropertySerializer
    # As they are many properties, you use *many=True*

    component_properties = ComponentPropertySerializer(many=True, read_only=True)

    class Meta:
        model = Component
        fields = ('name', 'component_properties')
        depth = 1

我认为这应该再现所需的输出。嵌套序列化在 Django REST Framework's docs .