如何在 django rest 框架中列出來自特定 model 的所有對象？

Question

我有兩個模型：

class Product(models.Model):
    name = models.CharField(max_length=200)
    price = models.DecimalField(default=0, decimal_places=2, max_digits=10)

    def __str__(self):
        return self.name

class Receipt(models.Model):
    purchase_date = models.DateTimeField(auto_now=True, null=False)
    shop = models.ForeignKey(Shop, on_delete=models.SET_NULL, null=True)
    products = models.ForeignKey(Product, on_delete=models.SET_NULL, null=True)

    def __str__(self):
        return super().__str__()

我的收據 url 看起來像這樣：

我希望它顯示所有產品的列表，而不是其中的一些。 這個怎么做？

我的觀點：

class ReceiptViewSet(viewsets.ModelViewSet):
    queryset = Receipt.objects.all()
    serializer_class = ReceiptSerializer
    permission_classes = [AllowAny]

class ProductViewSet(viewsets.ModelViewSet):
    queryset = Product.objects.all()
    serializer_class = ProductSerializer
    permission_classes = [AllowAny]
    enter code here

序列化器：

class ProductSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Product
        fields = ['id', 'name', 'price']

class ReceiptSerializer(serializers.HyperlinkedModelSerializer):
    products = serializers.PrimaryKeyRelatedField(read_only=True)

    class Meta:
        model = Receipt
        fields = ['id', 'purchase_date', 'shop', 'products']

Answer 1

您可以使用depth選項簡單地指定嵌套表示

試試這個

class ReceiptSerializer(serializers.HyperlinkedModelSerializer):
    ... 

    class Meta:
        model = Receipt
        fields = ['id', 'purchase_date', 'shop', 'products']
        depth = 1

否則

class ReceiptSerializer(serializers.HyperlinkedModelSerializer):
    products = ProductSerializer(many=True, read_only=True)
    ... 

    class Meta:
        model = Receipt
        fields = ['id', 'purchase_date', 'shop', 'products']

Answer 2

我已經嘗試過 Sumithran 的解決方案，但我做了一個小的調整，而不是使用 serializers.HyperlinkedModelSerializer 我使用了 serializers.ModelSerializer 並且它顯示的產品如下查看

希望它能回答你正在尋找的東西:)

from rest_framework import serializers

class ReciptSerializer(serializers.ModelSerializer):
    class Meta:
        model = Receipt
        fields = ['id', 'purchase_date', 'shop', 'products']
        depth = 1

class ProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = Product
        fields = '__all__'