有迁移Django 1.8.1项目的问题
Operations to perform:
Synchronize unmigrated apps: raven_contrib_django, staticfiles, found_dash, messages, allauth, humanize
Apply all migrations: account, found_auth, sessions, admin, sites, auth, found_assets, contenttypes
Synchronizing apps without migrations:
Creating tables...
Creating table allauth_socialapp
Creating table allauth_socialaccount
Creating table allauth_socialtoken
Running deferred SQL...
Raven is not configured (logging is disabled). Please see the documentation for more information.
Traceback (most recent call last):
File "src/manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
utility.execute()
File "/found/env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 330, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/base.py", line 390, in run_from_argv
self.execute(*args, **cmd_options)
File "/found/env/local/lib/python2.7/site-packages/raven/contrib/django/management/__init__.py", line 41, in new_execute
return original_func(self, *args, **kwargs)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/base.py", line 441, in execute
output = self.handle(*args, **options)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 179, in handle
created_models = self.sync_apps(connection, executor.loader.unmigrated_apps)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 317, in sync_apps
cursor.execute(statement)
File "/found/env/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/found/env/local/lib/python2.7/site-packages/django/db/utils.py", line 97, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/found/env/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 62, in execute
return self.cursor.execute(sql)
django.db.utils.ProgrammingError: relation "django_site" does not exist
抱怨django_site不存在。这是我的应用配置：
INSTALLED_APPS = (
'django.contrib.sites',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',...
包含网站框架。只有在使用Postgres数据库时才会出现此错误，SQLite数据库工作正常。
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'found',
'USER': 'found',
'PASSWORD': 'xxx',
'HOST': '127.0.0.1',
'PORT': '5432',
}
}
完整配置here。
./manage.py dbshell很好地进入数据库：
(env)deploy@w1:/found$ src/manage.py dbshell
Password for user found:
psql (9.3.6)
SSL connection (cipher: DHE-RSA-AES256-SHA, bits: 256)
Type "help" for help.
found=> \dt
List of relations
Schema | Name | Type | Owner
--------+-------------------+-------+-------
public | django_migrations | table | found
(1 row)
found=>
正在运行./manage.py flush
(env)deploy@w1:/found$ src/manage.py flush
You have requested a flush of the database.
This will IRREVERSIBLY DESTROY all data currently in the 'found' database,
and return each table to an empty state.
Are you sure you want to do this?
Type 'yes' to continue, or 'no' to cancel: yes
Traceback (most recent call last):
File "src/manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
utility.execute()
File "/found/env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 330, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/base.py", line 390, in run_from_argv
self.execute(*args, **cmd_options)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/base.py", line 441, in execute
output = self.handle(*args, **options)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/commands/flush.py", line 84, in handle
self.emit_post_migrate(verbosity, interactive, database)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/commands/flush.py", line 105, in emit_post_migrate
emit_post_migrate_signal(set(all_models), verbosity, interactive, database)
File "/found/env/local/lib/python2.7/site-packages/django/core/management/sql.py", line 280, in emit_post_migrate_signal
using=db)
File "/found/env/local/lib/python2.7/site-packages/django/dispatch/dispatcher.py", line 201, in send
response = receiver(signal=self, sender=sender, **named)
File "/found/env/local/lib/python2.7/site-packages/django/contrib/sites/management.py", line 20, in create_default_site
if not Site.objects.using(using).exists():
File "/found/env/local/lib/python2.7/site-packages/django/db/models/query.py", line 586, in exists
return self.query.has_results(using=self.db)
File "/found/env/local/lib/python2.7/site-packages/django/db/models/sql/query.py", line 479, in has_results
return compiler.has_results()
File "/found/env/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 808, in has_results
return bool(self.execute_sql(SINGLE))
File "/found/env/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 837, in execute_sql
cursor.execute(sql, params)
File "/found/env/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/found/env/local/lib/python2.7/site-packages/django/db/utils.py", line 97, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/found/env/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: relation "django_site" does not exist
LINE 1: SELECT (1) AS "a" FROM "django_site" LIMIT 1
答案 0 :(得分：2)
问题是Django的内部问题。它没有考虑您的应用在创建表格时对django_site的依赖性。
但是，您可以轻松避免为依赖django.contrib.sites导致错误的应用创建迁移的问题。
通过以下方式解决此问题：
src/manage.py makemigrations allauth
（现有迁移将导致稍后创建表，并在迁移的应用之间执行依赖性检查。）