Django1.7应用程序标签不是唯一的，重复的

Question

我在django1.7中遇到了一个与新的应用程序注册表有关的问题。通常，我会销毁实例并重新创建它，但是当我销毁实例时，它会继续发生。在

总是产品应用程序导致了这个错误，我使用了应用程序副本文件将标签更改为sc\U products，但是现在已经定义了sc\U products。在

在这个特定的例子中，我试图迁移应用程序。在

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

我已经在这里做了以下的回答：

How to resolve "django.core.exceptions.ImproperlyConfigured: Application labels aren't unique, duplicates: foo" in Django 1.7?

Answer 1

检查已安装的应用程序。我不小心把同一个应用程序列了两次，也出现了类似的错误。在

Answer 2

我也遇到过同样的问题，只是偶然发现了这个问题。在调试django一段时间后，我可能会为您找到等待已久的答案。在

最有可能发生这种情况的原因是，你的应用程序最终会同时被视为未迁移和已迁移（因此，即使在更改应用程序标签时也会产生相同的错误），而这反过来又会发生，因为你的应用程序既有旧式（south）迁移，也有新式（django）迁移。在

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*），并重新调用manage.py makemigrations，确保只剩下django迁移并且是最新的。在