Django 1.7应用程序标签不是唯一的,重复foo

Question

在特定部署中,我遇到了Django 1.7与新App Registry有关的问题.通常我会吹掉实例并重新创建它,但是当我销毁实例时它会继续发生.

它始终是导致此错误的产品应用程序,我使用app.py文件将标签更改为sc_products,但是现在sc_products的内容也已定义.

在这个特定的例子中,我试图迁移应用程序.

Running migrations:
  Applying sc_products.0001_initial...Traceback (most recent call last):
  File "manage.py", line 9, in <module>
    execute_from_command_line(sys.argv)
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 160, in handle
    executor.migrate(targets, plan, fake=options.get("fake", False))
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 63, in migrate
    self.apply_migration(migration, fake=fake)
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 91, in apply_migration
    if self.detect_soft_applied(migration):
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 135, in detect_soft_applied
    apps = project_state.render()
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/db/migrations/state.py", line 57, in render
    self.apps = Apps([AppConfigStub(label) for label in sorted(self.real_apps + list(app_labels))])
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/apps/registry.py", line 56, in __init__
    self.populate(installed_apps)
  File "/home/savingschampion/.virtualenvs/savings_champion/local/lib/python2.7/site-packages/django/apps/registry.py", line 89, in populate
    "duplicates: %s" % app_config.label)
django.core.exceptions.ImproperlyConfigured: Application labels aren't unique, duplicates: sc_products

我已经在那里做了以下回答:

如何在Django 1.7中解决"django.core.exceptions.ImproperlyConfigured:应用程序标签不唯一,重复:foo"？

Answer 1

我也遇到过同样的问题，并且刚刚偶然发现了这一点。在调试 django 一段时间后，我可能会给你期待已久的答案。

这种情况很可能发生，因为您的应用程序最终同时被视为未迁移和已迁移（因此即使您更改应用程序标签，也会产生相同的错误），而这种情况又会发生，因为您的应用程序同时具有旧式（南）迁移和新式（django）迁移。

解决这个问题最好、最简单的方法就是重新开始。删除所有编号的迁移（例如rm migrations/0???_*.py*）并manage.py makemigrations重新调用，确保仅留下 django 迁移并且是最新的。