/ 关系“main_post”处的 ProgrammingError 不存在

Posted 2023-03-14

【中文标题】/ 关系“main_post”处的 ProgrammingError 不存在

【英文标题】：ProgrammingError at / relation "main_post" does not exist

【发布时间】：2016-05-01 06:28:39

【问题描述】：

您好，我正在使用 django 和 postgresql。我得到了上述错误。我有这样的数据库设置：

DATABASES = 
    'default': 
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'django_db',
        'USER': 'xxx',
        'PASSWORD':'xxxx',
        'HOST':'localhost',
        'PORT':'5432',
    
 

对于类似 sqlite 的问题，我本可以删除 db(mydatabase) 但这次我看不到我的 db 在哪里。

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/

Django Version: 1.8.4
Python Version: 2.7.6
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'main',
 'tastypie')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.middleware.security.SecurityMiddleware')


Traceback:
File "/env/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  132.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/ebagu/main/views.py" in index
  47.               post_list = sorted(post_list, key=lambda x: x.get_score(), reverse=True)
File "/env/local/lib/python2.7/site-packages/django/db/models/query.py" in __iter__
  162.         self._fetch_all()
File "/env/local/lib/python2.7/site-packages/django/db/models/query.py" in _fetch_all
  965.             self._result_cache = list(self.iterator())
File "/env/local/lib/python2.7/site-packages/django/db/models/query.py" in iterator
  238.         results = compiler.execute_sql()
File "/env/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  840.             cursor.execute(sql, params)
File "/env/local/lib/python2.7/site-packages/django/db/backends/utils.py" in execute
  79.             return super(CursorDebugWrapper, self).execute(sql, params)
File "/env/local/lib/python2.7/site-packages/django/db/backends/utils.py" in execute
  64. .cursor.execute(sql, params)
File "/home/younggue/Desktop/ebagu1/env/local/lib/python2.7/site-packages/django/db/utils.py" in __exit__
  97.                 six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/env/local/lib/python2.7/site-packages/django/db/backends/utils.py" in execute
  64.                 return self.cursor.execute(sql, params)

Exception Type: ProgrammingError at /
Exception Value: relation "main_post" does not exist
LINE 1: ...id", "main_post"."views", "main_post"."slug" FROM "main_post...
                                                             ^

sqlflush 的输出：

BEGIN;
TRUNCATE "django_admin_log", "auth_permission", "auth_group", "auth_group_permissions", "django_session", "auth_user_groups", "auth_user_user_permissions", "main_category", "tastypie_apiaccess", "main_vote", "auth_user", "tastypie_apikey", "django_content_type";
SELECT setval(pg_get_serial_sequence('"django_admin_log"','id'), 1, false);
SELECT setval(pg_get_serial_sequence('"auth_permission"','id'), 1, false);
SELECT setval(pg_get_serial_sequence('"auth_group"','id'), 1, false);
SELECT setval(pg_get_serial_sequence('"auth_user"','id'), 1, false);
SELECT setval(pg_get_serial_sequence('"django_content_type"','id'), 1, false);
SELECT setval(pg_get_serial_sequence('"main_category"','id'), 1, false);
SELECT setval(pg_get_serial_sequence('"main_post"','id'), 1, false);
SELECT setval(pg_get_serial_sequence('"main_vote"','id'), 1, false);
SELECT setval(pg_get_serial_sequence('"tastypie_apiaccess"','id'), 1, false);
SELECT setval(pg_get_serial_sequence('"tastypie_apikey"','id'), 1, false);

COMMIT;

来自syncdb/migrate的输出：

Operations to perform:
  Synchronize unmigrated apps: staticfiles, froala_editor, messages, crispy_forms
  Apply all migrations: userena, sessions, admin, guardian, tastypie, auth, contenttypes, accounts, main, easy_thumbnails
Synchronizing apps without migrations:
  Creating tables...
    Running deferred SQL...
  Installing custom SQL...
Running migrations:
  No migrations to apply.

【问题讨论】：

你能提供完整的堆栈错误吗？标题错误有点模棱两可。

@AaronLayfield opps 抱歉刚刚更新了

main_post 是否引用了您的 Django 应用程序中的任何内容？我看到您有一个名为 main 的应用程序，并且发布的声音可能是该应用程序中的模型。 SQL 错误表明这是缺失的。尝试执行 python manage.py sqlflush，然后执行 migrate 和 makemigrations，以检查 Db 是否准确代表应用程序中的模型。

另外，请尝试syncdb。

我尝试了所有这些但同样的错误，我不确定 main_post 来自哪里......我有一个名为 main 的应用程序和一个名为 Post 的模型。我看到它来自 post_list = Post.objects.all() post_list = sorted(post_list, key=lambda x: x.get_score(), reverse=True)

【参考方案1】：

用这种方法卸载 postgresql：How to thoroughly purge and reinstall postgresql on ubuntu? 然后在this youtube video 的帮助下重新安装解决了这个问题。