FOREIGN KEY 约束失败 - Django答案

【问题标题】：FOREIGN KEY constraint failed - DjangoFOREIGN KEY 约束失败 - Django
【发布时间】：2021-05-01 12:17:20
【问题描述】：

所以我正在尝试为我的 API 创建删除路由，但遇到了问题。每当我点击删除路线时，我都会收到一个错误django.db.utils.IntegrityError: FOREIGN KEY constraint failed。如果删除路线被击中，我正在尝试删除模型。我已经完成了makemigrations 和migrate，但没有任何变化。我的代码示例如下：

class RandomAPIView(APIView):
    def delete(self, request, id, format=None):
        product = Product.objects.get(pk=id)
        product.delete()
        return Response({'Success':'Product has been deleted'})

models.py 中的产品

class Product(models.Model):
    name = models.CharField(max_length=200)
    category = models.ForeignKey(Category, on_delete=models.CASCADE, blank=True, null=True)

    def __str__(self):
        return self.name

【问题讨论】：

标签： python django django-rest-framework

【解决方案1】：

您应该使用 django-rest-framework 的序列化程序和视图集来实现这一点。 (RTFM)


## serializers.py

from rest_framework import serializers

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

## views.py
from rest_framework import viewsets, mixins

# below subclassing is done to only allow deletion, 
# u can also use `viewsets.ModelViewSet` to allow all operations
# such as `list`, `create`, etc.
class ProductViewSet(viewsets.GenericAPIView, mixins.DestroyModelMixin):
    queryset = Product.objects.all()
    serializer_class = ProductSerializer

Reference to DRF's docs.

【讨论】：