Question

这就是我一直在做的事情：

本地 - 我有一个全新的postgres数据库，以及来自两个不同应用程序的两个models.py文件：

python manage.py syncdb
python manage.py schemamigration api --initial
python manage.py schemamigration extapi --initial
python manage.py migrate api 0001 --fake
python manage.py migrate extapi 0001 --fake

这很有效，我可以很好地将数据添加到数据库中。

然后，当推送到Heroku时，我已经创建了一个空应用程序：

git add .
git commit -m "Ready to go to Heroku"
git push heroku master
heroku run python manage.py syncdb

输出这个：

Running `python manage.py syncdb` attached to terminal... up, run.9548
Syncing...
Creating tables ...
Creating table django_admin_log
Creating table auth_permission
Creating table auth_group_permissions
Creating table auth_group
Creating table auth_user_groups
Creating table auth_user_user_permissions
Creating table auth_user
Creating table django_content_type
Creating table django_session
Creating table south_migrationhistory

# create superuser prompt...
Superuser created successfully.
Installing custom SQL ...
Installing indexes ...
Installed 0 object(s) from 0 fixture(s)

Synced:
 > django.contrib.admin
 > django.contrib.auth
 > django.contrib.contenttypes
 > django.contrib.sessions
 > django.contrib.messages
 > django.contrib.staticfiles
 > south
 > rest_framework

Not synced (use migrations):
 - api
 - extapi

然后我尝试使用heroku run python manage.py migrate迁移这些应用并收到此错误：

Running `python manage.py migrate` attached to terminal... up, run.3724
Running migrations for api:
 - Migrating forwards to 0001_initial.
 > api:0001_initial
FATAL ERROR - The following SQL query failed: ALTER TABLE "api_song" ADD CONSTRAINT "summary_id_refs_id_36bb6e06" FOREIGN KEY ("summary_id") REFERENCES "extapi_summary" ("id") DEFERRABLE INITIALLY DEFERRED;
The error was: relation "extapi_summary" does not exist

Error in migration: api:0001_initial
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
    utility.execute()
  File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/base.py", line 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/app/.heroku/python/lib/python2.7/site-packages/south/management/commands/migrate.py", line 111, in handle
    ignore_ghosts = ignore_ghosts,
  File "/app/.heroku/python/lib/python2.7/site-packages/south/migration/__init__.py", line 220, in migrate_app
    success = migrator.migrate_many(target, workplan, database)
  File "/app/.heroku/python/lib/python2.7/site-packages/south/migration/migrators.py", line 254, in migrate_many
    result = migrator.__class__.migrate_many(migrator, target, migrations, database)
  File "/app/.heroku/python/lib/python2.7/site-packages/south/migration/migrators.py", line 329, in migrate_many
    result = self.migrate(migration, database)
  File "/app/.heroku/python/lib/python2.7/site-packages/south/migration/migrators.py", line 133, in migrate
    result = self.run(migration, database)
  File "/app/.heroku/python/lib/python2.7/site-packages/south/migration/migrators.py", line 114, in run
    return self.run_migration(migration, database)
  File "/app/.heroku/python/lib/python2.7/site-packages/south/migration/migrators.py", line 85, in run_migration
    south.db.db.execute_deferred_sql()
  File "/app/.heroku/python/lib/python2.7/site-packages/south/db/generic.py", line 318, in execute_deferred_sql
    self.execute(sql)
  File "/app/.heroku/python/lib/python2.7/site-packages/south/db/generic.py", line 282, in execute
    cursor.execute(sql, params)
  File "/app/.heroku/python/lib/python2.7/site-packages/django/db/backends/util.py", line 53, in execute
    return self.cursor.execute(sql, params)
  File "/app/.heroku/python/lib/python2.7/site-packages/django/db/utils.py", line 99, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/app/.heroku/python/lib/python2.7/site-packages/django/db/backends/util.py", line 53, in execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: relation "extapi_summary" does not exist

对我而言，看起来桌子甚至没有被创建，但我不知道为什么不。当我运行heroku run python manage.py sqlall时，它表示已经完成了所有操作，但随后我查看了数据库本身（heroku在s3上创建的那个），app_one和app_two没有任何内容。再一次，这一切都在本地完美运行，只是当它在heroku上升时，事情就会崩溃。

Answer 1

应该通过推迟创建api_userprofile来处理循环导入，但由于South处理事务的方式，它会中断。

原来如此！实现这项工作的最简单方法是让syncdb生成所有表，然后伪造迁移：

python manage.py syncdb --all

这让我们：

Synced:
 > django.contrib.admin
 > django.contrib.auth
 > django.contrib.contenttypes
 > django.contrib.sessions
 > django.contrib.messages
 > django.contrib.staticfiles
 > api
 > extapi
 > moodranker
 > recommender
 > south
 > rest_framework

Not synced (use migrations):
 -

然后伪造迁移：

python manage.py migrate --fake

Answer 2

删除迁移文件夹，然后执行

python manage.py makemigrations appname

python manage.py migrate --run-syncdb

python manage.py migrate --fake appname

使用South在Djoku上设置Django的麻烦 - 继续得到ProgrammingError：关系不存在

2 个答案: