嵌套的Django REST

Question

在Django REST中使用嵌套的序列化程序似乎很簡單。
但我找不到任何錯誤的，我code.carts不露面
我曾跟隨http://www.django-rest-framework.org/api-guide/relations/#nested-relationships
只有一點不同的是，我用JSONField。
這不應該是一個問題。

class MailAPIOrderItemSerializer(serializers.ModelSerializer): 
    product = serializers.SerializerMethodField() 
    category = serializers.SerializerMethodField() 
    variant = serializers.SerializerMethodField() 

    class Meta: 
     model = OrderItem 
     fields = ('category', 'product', 'variant') 

    def get_variant(self, obj: OrderItem): 
     return obj.product.get('level_two') 

    def get_category(self, obj: OrderItem): 
     return obj.product.get('service_name') 

    def get_product(self, obj: OrderItem): 
     return obj.product.get('product_name') 

class MailAPIOrderSerializer(serializers.ModelSerializer): 
    ... 
    carts = MailAPIOrderItemSerializer(many=True, read_only=True) 

    class Meta: 
     model = Order 
     fields = (
      ... 
      'carts' 
     ) 

    def get_staff_name(self, order: Order): 
     return order.staff.full_name 

class OrderItem(AbstractSoftModelController): 
    order = models.ForeignKey(Order, related_name='order_items', verbose_name=_('Order')) 
    product = JSONField(verbose_name=_('Product')) 

我時序解決方案：
眼下。我的工作圍繞通過更換
carts = serializers.SerializerMethodField()
而在方法我用

def get_carts(self, order: Order): 
    qs = order.order_items.all() 
    serializer = MailAPIOrderItemSerializer(qs, many=True) 
    return serializer.data 

Answer 1

在模型Order你有backref場order_items沒有carts。因此請嘗試更改MailAPIOrderSerializer中的字段名稱：

order_items = MailAPIOrderItemSerializer(many=True, read_only=True) 

class Meta: 
    model = Order 
    fields = (
     ... 
     'order_items' 
    )