Django错误：ValueError: Dependency on app with no migrations

详细错误提示：

Traceback?(most?recent?call?last):
??File?"/usr/local/lib/python2.7/dist-packages/django/utils/autoreload.py",?line?228,?in?wrapper
????fn(*args,?**kwargs)
??File?"/usr/local/lib/python2.7/dist-packages/django/core/management/commands/runserver.py",?line?128,?in?inner_run
????self.check_migrations()
??File?"/usr/local/lib/python2.7/dist-packages/django/core/management/base.py",?line?422,?in?check_migrations
????executor?=?MigrationExecutor(connections[DEFAULT_DB_ALIAS])
??File?"/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py",?line?20,?in?__init__
????self.loader?=?MigrationLoader(self.connection)
??File?"/usr/local/lib/python2.7/dist-packages/django/db/migrations/loader.py",?line?52,?in?__init__
????self.build_graph()
??File?"/usr/local/lib/python2.7/dist-packages/django/db/migrations/loader.py",?line?223,?in?build_graph
????self.add_external_dependencies(key,?migration)
??File?"/usr/local/lib/python2.7/dist-packages/django/db/migrations/loader.py",?line?188,?in?add_external_dependencies
????parent?=?self.check_key(parent,?key[0])
??File?"/usr/local/lib/python2.7/dist-packages/django/db/migrations/loader.py",?line?169,?in?check_key
????raise?ValueError("Dependency?on?app?with?no?migrations:?%s"?%?key[0])
ValueError:?Dependency?on?app?with?no?migrations:?UserManagement

解决办法：

manage.py?makemigrations?UserManagement

为UserManagement创建迁移

相关文档介绍：https://docs.djangoproject.com/en/1.7/topics/migrations/#s-custom-fields

（编辑：李大同）

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