python - Django - 需要一些关于如何实现 ManyToMany 数据库的指导

Question

我希望能够让用户指出他们访问过的国家/地区。我的 models.py 看起来像这样:

class User(models.Model):
      name = models.CharField(max_length=50)
      countries = models.ManyToManyField(Countries)

class Countries(models.Model):
      #This is where I don't know what to do.
      #The end goal is for the user to be able to check off what countries he/she has visited

Answer 1

你会以相反的方式建立关系

 class User(models.Model):
     name = models.CharField(max_length=50)

 class Countries(models.Model):
     user = models.ForeignKey(User)

如果您正在使用 django 的内置用户内容，那么您只需要这个。

from django.contrib.auth.models import User

class Countries(models.Model):
    user = models.ForeignKey(User)