Python 我的模特怎么了

我正在使用Django 1.4和PostgreSQL 9.1.4

我的模特怎么了

class UserProfile(models.Model):
    ROLES_TYPE = (
        ('Employee', 'Employee'),
        ('Employor', 'Employor'),
    )
    user = models.OneToOneField(User, related_name='Profile')
    role = models.CharField(max_length=15, choices=ROLES_TYPE)

class Student(models.Model):
    id = models.AutoField(db_column='studentid', primary_key=True)
    username = models.OneToOneField(UserProfile, related_name='Employee')
    first_name = models.CharField(db_column='fname', max_length=100,
                              null=True, blank=True)
    last_name = models.CharField(db_column='lname', max_length=100,
                             null=True, blank=True)

运行./manage.py syncdb时，出现错误

Creating tables ...
Creating table Student
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/home/jayapaldharmamani/Projects/jayapal/aplink/aplink_env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
utility.execute()
  File "/home/jayapaldharmamani/Projects/jayapal/aplink/aplink_env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/jayapaldharmamani/Projects/jayapal/aplink/aplink_env/local/lib/python2.7/site-packages/django/core/management/base.py", line 196, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/jayapaldharmamani/Projects/jayapal/aplink/aplink_env/local/lib/python2.7/site-packages/django/core/management/base.py", line 232, in execute
    output = self.handle(*args, **options)
  File "/home/jayapaldharmamani/Projects/jayapal/aplink/aplink_env/local/lib/python2.7/site-packages/django/core/management/base.py", line 371, in handle
    return self.handle_noargs(**options)
  File "/home/jayapaldharmamani/Projects/jayapal/aplink/aplink_env/local/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 102, in handle_noargs
    cursor.execute(statement)
  File "/home/jayapaldharmamani/Projects/jayapal/aplink/aplink_env/local/lib/python2.7/site-packages/django/db/backends/util.py", line 40, in execute
    return self.cursor.execute(sql, params)
  File "/home/jayapaldharmamani/Projects/jayapal/aplink/aplink_env/local/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 52, in execute
    return self.cursor.execute(query, args)
django.db.utils.DatabaseError: column "id" referenced in foreign key constraint does not exist

创建表“学生”(

请帮帮我

谢谢和问候，

---

Jayapal D

尝试从

Student

模型中的

id

列中删除

db\u column='studentid'

为什么要更改列名

---

另外，为什么不使用自动id？

这是由数据库而不是django本身产生的问题。请尝试重新创建数据库架构（您可以删除所有相关列并执行

/manage.py syncdb

我尝试了这两种方法，但错误相同。如果删除字段用户名，则效果良好。为什么需要id为的异常db名称？请尝试删除此行：

id=models.AutoField（db\u column='studentid'，primary\u key=True）

。您不需要它（django将自动pk设置为每个模型）我尝试了所有可能的方法，但都出现了相同的错误。我删除了ID字段和相关名称。您能否发布django尝试执行的sql查询？请回答您的问题。

 "id" serial NOT NULL PRIMARY KEY,
       "user_id" integer NOT NULL UNIQUE REFERENCES "auth_user" ("id") DEFERRABLE     INITIALLY DEFERRED,
        "role" varchar(15) NOT NULL
    );

       "id" serial NOT NULL PRIMARY KEY,
       "username_id" integer NOT NULL UNIQUE REFERENCES "admin_userprofile" ("id") DEFERRABLE INITIALLY DEFERRED
    );