Django REST框架序列化器中的内嵌关系

Question

这是我models.py的一部分：

class Discount(models.Model):
    discount_id = models.AutoField(primary_key=True)
    discount_category = models.ManyToManyField(Category)
    discount_store = models.ManyToManyField(Store)
    ...

class Store(models.Model):
    store_id = models.AutoField(primary_key=True)
    store_company =models.ForeignKey('Company')
    store_city = models.ForeignKey('City', to_field='city_name')
    ....

这是我serializer.py的一部分：

class StoreSerializer(serializers.ModelSerializer):
class Meta:
    model = Store
    fields = ('store_location', 'store_city', 'store_name', 'store_address')


class DiscountSerializer(serializers.ModelSerializer):
    class Meta:
        model = Discount
        fields = ('discount_description', 'discount_start', 'discount_end', discount_title', 'discount_category', 'discount_store')

当我为折扣创建JSON时，我得到了这个JSON。

[{
    "discount_description": "Description here.",
    "discount_start": "2014-08-07T14:35:13Z",
    "discount_end": "2014-08-30T14:35:15Z",
    "discount_title": "Lorem İpsum",
    "discount_category": [
        3
    ],
    "discount_store": [
        1
    ]
}]

但是我想在“discount_store”中看到商店的详细信息。我尝试了很多种关系设置，但每次得到的都是这个JSON。

Answer 1

你有没有试着在Meta类里面加一个选项叫depth呢？可能像这样：

class DiscountSerializer(serializers.ModelSerializer):
    class Meta:
        model = Discount
        fields = ('discount_description', 'discount_start', 'discount_end', 'discount_title', 'discount_category', 'discount_store')
        depth = 1