Question

我有模特：

class CommonEditor(models.Model):
    def __str__(self):
        return 'Common Atributes Mask'


class Color(models.Model):
    name = models.CharField(max_length=25)
    editor = models.ForeignKey(CommonEditor, on_delete=models.PROTECT, null=True)

所以我这样进行序列化：

class ColorSerializer(serializers.ModelSerializer):
    class Meta:
        model = Color
        fields = '__all__'

class CommonAttributesSerializer(serializers.ModelSerializer):
    color = ColorSerializer(many=True, read_only=True)

    class Meta:
        model = CommonEditor
        fields = ('pk', 'color')

然后查看：

class CommonAttributeAPIView(generics.ListCreateAPIView):
    serializer_class = CommonAttributesSerializer
    queryset = CommonEditor.objects.all()

我只有我的CommonEditor模型的pk。为什么我无法获得完整的Atributes面膜，该如何修复？非常感谢！

Answer 1

反向外键关系的默认名称为modelname_set，或者在您的情况下为color_set。因此，尝试将color字段重命名为color_set：

class CommonAttributesSerializer(serializers.ModelSerializer):
    color_set = ColorSerializer(many=True, read_only=True)

    class Meta:
        model = CommonEditor
        fields = ('pk', 'color_set')

Answer 2

select * from wp_woocommerce_sessions; select * from wp_usermeta where meta_key like '_woocommerce_persistent_cart_%';在 CommonEditor 的实例中搜索 CommonAttributesSerializer 属性，但找不到。在DRF序列化程序中，名为color的参数将明确说明在哪里寻找数据。因此，如下更改串行器：

source

参考：DRF Fields -source

Answer 3

这也可以通过SerializerMethodField来实现，并且可以如下所示：

class CommonAttributesSerializer(serializers.ModelSerializer):
    color = serializers.SerializerMethodField()

    class Meta:
        model = CommonEditor
        fields = ('pk', 'color')

    def get_color(self, common_editor):
        return ColorSerializer(common_editor.color_set.all(), many=True).data

文档：http://www.django-rest-framework.org/api-guide/fields/#serializermethodfield

子模型的序列化

3 个答案: