无此列错误消息

Question

我从django网站上阅读了教程，现在我遇到了麻烦。这看起来很简单，但给了我一个问题。每次我运行填充_兰戈.py脚本我得到一个错误。在

我修改了我的剧本模型.py文件基于Tango和Django站点的示例，但是仍然得到这个并没有创建一个列。在

错误：

    Starting Rango population script...
Traceback (most recent call last):
  File "populate_rango.py", line 67, in <module>
    populate()
  File "populate_rango.py", line 8, in populate
    url="http://www.google.com")
  File "populate_rango.py", line 55, in add_page
    p = Page.objects.get_or_create(category=cat, title=title, url=url, likes=likes, views=views)[0]
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-    packages/django/db/models/manager.py", line 154, in get_or_create
    return self.get_queryset().get_or_create(**kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/query.py", line 376, in get_or_create
    return self.get(**lookup), False
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/query.py", line 304, in get
    num = len(clone)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/query.py", line 77, in __len__
    self._fetch_all()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/query.py", line 857, in _fetch_all
   self._result_cache = list(self.iterator())
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/query.py", line 220, in iterator
    for row in compiler.results_iter():
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 713, in results_iter
    for rows in self.execute_sql(MULTI):
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 786, in execute_sql
    cursor.execute(sql, params)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site- packages/django/db/backends/util.py", line 69, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/backends/util.py", line 53, in execute
    return self.cursor.execute(sql, params)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/utils.py", line 99, in __exit__
   six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-         packages/django/db/backends/util.py", line 53, in execute
    return self.cursor.execute(sql, params)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-    packages/django/db/backends/sqlite3/base.py", line 451, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such column: rango_page.likes

填充_兰戈.py在

^{pr2}$

在模式.py公司名称：

from django.db import models

class Category(models.Model):
    name = models.CharField(max_length=128, unique=True)

    def __unicode__(self):
        return self.name

class Page(models.Model):
    category = models.ForeignKey(Category)
    title = models.CharField(max_length=128)
    url = models.URLField()
    likes = models.IntegerField(default=0)    
    views = models.IntegerField(default=0)

    def __unicode__(self):
        return self.title

Answer 1

运行此命令：

python manage.py sqlall <your_app>

查看结果，如果其中没有likes表，请运行此命令并手动添加：

^{pr2}$

您可以使用以下代码添加它：

ALTER TABLE "Page" ADD COLUMN "likes" IntegerField(0)

但请注意，一旦创建了表，syncdb不会对集成架构进行更改。您必须手动删除数据库，然后再次执行syncdb。 更多信息请阅读django站点中的THIS配方syncdb！在