我正在尝试在 django 中添加多对多字段但出现错误

Posted 2023-03-21

【中文标题】我正在尝试在 django 中添加多对多字段但出现错误

【英文标题】：I am trying to add many to many feild in django but getting error

【发布时间】：2022-01-04 08:04:57

【问题描述】：

模型是-

class Product(models.Model):

    name = models.CharField(max_length=50)
    price = models.IntegerField(default=0)
    seller=models.ForeignKey(Seller,null=True,on_delete=models.CASCADE,)        
    category = models.ForeignKey(Category,null=True, on_delete=models.CASCADE,)
    description = models.CharField(max_length=200, default='' , null=True , blank=True)
    image = models.ImageField(upload_to='uploads/products/')
    rating=models.FloatField(null=True)
    people=models.IntegerField(default=0,null=True)
    customers=models.ManyToManyField(Customer,blank=True)

class Customer(models.Model):

    user_name = models.CharField(max_length=50)
    phone = models.IntegerField(default='8928')
    email = models.EmailField()
    password = models.CharField(max_length=500)
        

        qq=Product.objects.get(id=8) 
        print(qq)
        print(Customer.objects.all().first()) 
        qq.customers.add(Customer.objects.all().first())
        print("qq.customers is",qq.customers)

"""
Product object (8)
Customer object (1)
qq.customers is store.Customer.None"""

我想知道我们如何在 product.customers 中添加客户，在这个问题中没有显示。请帮我解决这个问题

【参考方案1】：

print(qq.customers.all())

它将向客户展示。