Question

我有两个表用户和地址。用户有很多要求。

class User(models.Model):
    user_id=models.AutoField(primary_key = True)
    catcher_fname = models.CharField(max_length = 128, blank = True)
    catcher_lname = models.CharField(max_length = 128, blank = True)
    api_key = models.CharField(max_length = 100, blank = False)



class Address (models.Model):
    address_id=models.AutoField(primary_key = True)
    address = models.CharField(max_length = 150)
    city = models.CharField(max_length = 255)
    user = models.ForeignKey(User)

当我点击用户表时，我也想要他的地址并返回JSON。

user = User.obejcts.get（pk = 2）

它只返回用户数据而不是地址:(

Answer 1

models.py -

class User(models.Model):
    catcher_fname = models.CharField(max_length = 128, blank = True)
    catcher_lname = models.CharField(max_length = 128, blank = True)
    api_key = models.CharField(max_length = 100, blank = False)



class Address (models.Model):
    address = models.CharField(max_length = 150)
    city = models.CharField(max_length = 255)
    user = models.ForeignKey(User,on_delete=models.CASCADE)

注意 - id字段是在django中自动增量和内置的，您无需直接指定。 以下是演示如何链接用户obj和地址obj。

>> from .models import User,Address
>> user_obj = User.objects.get(pk=pk)
>> address_obj = Address.objects.get(pk=address_pk)
>> user_obj.address = address_obj
>> user_obj.save()

稍后您可以从用户对象访问地址 -

>> from .models import User
>> user_obj = User.objects.get(pk=pk)
>> user_obj.address_set.all() (will give the data)

django中的一对多关系

1 个答案: