Question

我想添加一个字段Django User。所以我查看了这个文件：https://docs.djangoproject.com/en/1.8/topics/auth/customizing/

我决定使用AbstractUser来解决我的问题。

添加：

class MyUser(AbstractUser): 
    nickname = models.CharField(max_length=64, blank=False)

到muse.models。

并将AUTH_USER_MODEL = "muse.MyUser"添加到settings.py文件。

但是当我migrate总是有错误时：

  Synchronize unmigrated apps: staticfiles, messages
  Apply all migrations: admin, contenttypes, muse, auth, sessions
Synchronizing apps without migrations:
  Creating tables...
    Running deferred SQL...
  Installing custom SQL...
Running migrations:
  Rendering model states... DONE
  Applying admin.0001_initial...Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
    utility.execute()
  File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 330, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Library/Python/2.7/site-packages/django/core/management/base.py", line 390, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Library/Python/2.7/site-packages/django/core/management/base.py", line 441, in execute
    output = self.handle(*args, **options)
  File "/Library/Python/2.7/site-packages/django/core/management/commands/migrate.py", line 221, in handle
    executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
  File "/Library/Python/2.7/site-packages/django/db/migrations/executor.py", line 110, in migrate
    self.apply_migration(states[migration], migration, fake=fake, fake_initial=fake_initial)
  File "/Library/Python/2.7/site-packages/django/db/migrations/executor.py", line 147, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/Library/Python/2.7/site-packages/django/db/migrations/migration.py", line 115, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "/Library/Python/2.7/site-packages/django/db/migrations/operations/models.py", line 59, in database_forwards
    schema_editor.create_model(model)
  File "/Library/Python/2.7/site-packages/django/db/backends/base/schema.py", line 232, in create_model
    definition, extra_params = self.column_sql(model, field)
  File "/Library/Python/2.7/site-packages/django/db/backends/base/schema.py", line 131, in column_sql
    db_params = field.db_parameters(connection=self.connection)
  File "/Library/Python/2.7/site-packages/django/db/models/fields/related.py", line 1989, in db_parameters
    return {"type": self.db_type(connection), "check": []}
  File "/Library/Python/2.7/site-packages/django/db/models/fields/related.py", line 1980, in db_type
    rel_field = self.related_field
  File "/Library/Python/2.7/site-packages/django/db/models/fields/related.py", line 1886, in related_field
    return self.foreign_related_fields[0]
  File "/Library/Python/2.7/site-packages/django/db/models/fields/related.py", line 1620, in foreign_related_fields
    return tuple(rhs_field for lhs_field, rhs_field in self.related_fields)
  File "/Library/Python/2.7/site-packages/django/db/models/fields/related.py", line 1607, in related_fields
    self._related_fields = self.resolve_related_fields()
  File "/Library/Python/2.7/site-packages/django/db/models/fields/related.py", line 1592, in resolve_related_fields
    raise ValueError('Related model %r cannot be resolved' % self.rel.to)
ValueError: Related model 'muse.MyUser' cannot be resolved

怎么了？

Answer 1

在我的情况下，一个棘手的解决方法是可用的，我不建议，因为我的情况是如此特殊。我有自己的数据库管理，并将Django查询生成器放在一边，原因是（这是一个大学项目，不允许）。我手动操作了我的数据库结构，并拥有自己的用户模型和身份验证后端。

解决方法是创建迁移，然后手动删除其操作。创建迁移后，我必须禁用AUTH_USER_MODEL，迁移，然后启用该设置以使身份验证系统正常工作。

希望它有用。

无法解析Django AbstractUser迁移

1 个答案: