python - Django Rest Framework - 嵌套序列化未按预期工作

Question

在使用 Django-REST-Framework 时，我无法在嵌套的序列化对象中显示选定的字段。

我能够正确地序列化整个 Address 模型，但我只需要来自 Address 的几个字段，嵌套在我序列化的 Outlet。有一个

Got AttributeError when attempting to get a value for field outlet_address on serializer OutletSerializer. The serializer field might be named incorrectly and not match any attribute or key on the Outlet instance. Original exception text was: 'Outlet' object has no attribute 'outlet_address'.

api_v1/models.py

class Address(models.Model):
    building = models.CharField(_("shop number, floor & building"), max_length=128)
    street = models.CharField(_("street"), max_length=128, blank=True)
    area = models.ManyToManyField(Area, related_name='address')
    city = models.ForeignKey(City, related_name='address')
    pin_code = models.CharField(_("PIN code"), max_length=6, default="")

    def __unicode__(self):
        return self.building + " " + self.street + " ..."


class Outlet(models.Model):
    name = models.CharField(max_length=100, blank=True)
    chain = models.ForeignKey(Chain, related_name='outlet', blank=True, null=True)
    organization = models.ForeignKey(Organization, blank=True, null=True)
    address = models.OneToOneField(Address, related_name='outlet_address')
    thumbnail = AjaxImageField(upload_to='thumbnails',
                               max_height=200,  #optional
                               max_width=200,  # optional
                               crop=True)  # optional
    date_created = models.DateTimeField(_('date created'), default=timezone.now)

    def __unicode__(self):
        return self.name

api_v1/serializers.py

from rest_framework import serializers
from api_v1.models import Outlet, Address

class AddressSerializer(serializers.ModelSerializer):
    #address_area = AreaSerializer(many=False)

    class Meta:
        model = Address
        fields = ('building', 'street',)
        depth = 3


class OutletSerializer(serializers.ModelSerializer):
    outlet_address = AddressSerializer(many=False)
    #area = serializers.CharField(source='address.area') #multiple levels of nesting?

    class Meta:
        model = Outlet
        fields = ('id', 'name', 'thumbnail', 'outlet_address')
        # fields = ('id', 'name', 'thumbnail', 'address') # this works
        depth = 3

此时，它无法在 Outlet 模型中找到 outlet_address 属性，而我希望它应该能够在序列化程序中找到。

Got AttributeError when attempting to get a value for field outlet_address on serializer OutletSerializer. The serializer field might be named incorrectly and not match any attribute or key on the Outlet instance. Original exception text was: 'Outlet' object has no attribute 'outlet_address'.

如其他答案所述，我已经尝试过:

1. 将 many= 添加到 ModelSerializer
2. 将 related_name= 添加到所有模型

Answer 1

试试这个:

from rest_framework import serializers
from api_v1.models import Outlet, Address

class AddressSerializer(serializers.ModelSerializer):

    class Meta:
        model = Address
        fields = ('building', 'street',)
        depth = 3


class OutletSerializer(serializers.ModelSerializer):
    address = AddressSerializer(many=False) # make it address, not outlet_address

    class Meta:
        model = Outlet
        fields = ('id', 'name', 'thumbnail', 'address') # make this address as well, not outlet_address
        depth = 3

我之所以要进行上述更改，是因为 Outlet 模型没有名为“outlet_address”的属性，它有一个名为“address”的属性。

请参阅此处了解类似问题:Django Rest framework keeps returning error on nested relationship