django 1.5中的自定义用户模型

Question

我已经扩展了django 1.5用户模型,如下所示,当我将任何行插入数据库时​​,我遇到了问题.我的models.py文件如下所示.

class MyUserManager(BaseUserManager):

   def create_user(self, email, password=None):

     if not email:
        raise ValueError('Users must have an email address')

     user = self.model(
        email=MyUserManager.normalize_email(email),
     )

     user.set_password(password)
     user.save(using=self._db)
     return user

   def create_superuser(self, email, password):

     user = self.create_user(email,
        password=password
     )
     user.is_admin = True
     user.save(using=self._db)
     return user


 class MyUser(AbstractBaseUser):
    email = models.EmailField(
      verbose_name='Email address',
      max_length=255,
      unique=True,
      db_index=True,
    )
    is_active = models.BooleanField(default=True)
    is_admin = models.BooleanField(default=False)

    objects = MyUserManager()

    USERNAME_FIELD = 'email'

    def get_full_name(self):
      # The user is identified by their email address
      return self.email

    def __unicode__(self):
      return self.email

我的admin.py如下所示.

class MyUserAdmin(UserAdmin):
   # The forms to add and change user instances
   form = UserChangeForm
   add_form = UserCreationForm

   # The fields to be used in displaying the User model.
   # These override the definitions on the base UserAdmin
   # that reference specific fields on auth.User.
   list_display = ('email', 'is_admin')
   list_filter = ('is_admin',)
   fieldsets = (
     (None, {'fields': ('email', 'password')}),
     ('Permissions', {'fields': ('is_admin',)}),
     ('Important dates', {'fields': ('last_login',)}),
   )
   add_fieldsets = (
     (None, {
         'classes': ('wide',),
         'fields': ('email', 'password1', 'password2')}
     ),
   )
   search_fields = ('email',)
   ordering = ('email',)
   filter_horizontal = ()

// Now register the new UserAdmin...
admin.site.register(MyUser, MyUserAdmin)
// ... and, since we're not using Django's builtin permissions,
// unregister the Group model from admin.
admin.site.unregister(Group)

我按照上面的django教程(https://docs.djangoproject.com/en/dev/topics/auth/customizing/#a-full-example)

现在我遇到的问题是每当我修改管理员中的任何内容时,我收到的错误信息如下所示.

(1452,'无法添加或更新子行:外键约束失败(csiop.django_admin_log,CONSTRAINT user_id_refs_id_c8665aaFOREIGN KEY(user_id)REFERENCES auth_user(id))')

因此,看起来django_admin_log表总是需要对auth_user模型的外键引用.但是因为我创建了一个客户用户模型,当我创建一个超级用户时,用户详细信息只存储在客户MyUser表中,并且在auth_user模型中没有创建任何条目,这似乎导致了该问题.

我该如何解决这个问题？请建议.

谢谢Sreekanth

Answer 1

这看起来非常像(PostgreSQL)数据库错误 - 而不是Django错误."auth_user"(仍然)在数据库结构的ForeignKey约束中引用.您的自定义模型(称为"MyUser")不应存在此类问题.在这种情况下,引用应该类似于"accounts_myuser"或"myappname_myuser".

我想,你已经更新了现有的代码,包括一个旧的数据库.如果您不需要旧的管理日志,只需删除/删除名为"django_admin_log"的表,然后运行"python manage.py syncdb"(或1.7版本的"python manage.py migrate")让Django重新创建这张桌子从头开始.

但要小心:如果你有其他表引用"旧的"Django用户模型,你将在其他位置再次遇到同样的问题.