Question

我正在使用Django 1.4.5并遵循Django Docs

的Django 1.4教程

我有两个模型，在models.py中定义如下：

from django.db import models

# Create your models here.
class Poll(models.Model):
    question = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

class Choice(models.Model):
    poll = models.ForeignKey(Poll)
    choice = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

在Django shell中创建Poll实例后，我尝试使用Poll.objects.all（）。delete（）删除它并收到以下错误：

DatabaseError: no such column: polls_choice.poll_id

以下是整个Traceback

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/django/db/models/query.py", line 513, in delete
    collector.collect(del_query)
  File "/Library/Python/2.7/site-packages/django/db/models/deletion.py", line 175, in collect
    if not sub_objs:
  File "/Library/Python/2.7/site-packages/django/db/models/query.py", line 130, in __nonzero__
    iter(self).next()
  File "/Library/Python/2.7/site-packages/django/db/models/query.py", line 118, in _result_iter
    self._fill_cache()
  File "/Library/Python/2.7/site-packages/django/db/models/query.py", line 892, in _fill_cache
    self._result_cache.append(self._iter.next())
  File "/Library/Python/2.7/site-packages/django/db/models/query.py", line 291, in iterator
    for row in compiler.results_iter():
  File "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py", line 763, in results_iter
    for rows in self.execute_sql(MULTI):
  File "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py", line 818, in execute_sql
    cursor.execute(sql, params)
  File "/Library/Python/2.7/site-packages/django/db/backends/util.py", line 40, in execute
    return self.cursor.execute(sql, params)
  File "/Library/Python/2.7/site-packages/django/db/backends/sqlite3/base.py", line 344, in execute
    return Database.Cursor.execute(self, query, params)
DatabaseError: no such column: polls_choice.poll_id

感谢。

Answer 1

这是由以下选项之一产生的通用错误：

1-您在创建Poll模型之前已同步数据库。

2-您根本没有同步数据库。

尝试：

python manage.py syncdb

manage.py位于Django项目的根目录中。

Django错误：尝试删除所有行时出现DatabaseError

1 个答案: