运行makemigrations报错：

bash -cl "/Users/lyx/PycharmProjects/djangotest/venv/bin/python /Applications/PyCharm.app/Contents/helpers/pycharm/django_manage.py makemigrations /Users/lyx/PycharmProjects/djangotest"

Traceback (most recent call last):

  File "/Applications/PyCharm.app/Contents/helpers/pycharm/django_manage.py", line 43, in <module>

    run_module(manage_file, None, '__main__', True)

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 176, in run_module

    fname, loader, pkg_name)

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 82, in _run_module_code

    mod_name, mod_fname, mod_loader, pkg_name)

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 72, in _run_code

    exec code in run_globals

  File "/Users/lyx/PycharmProjects/djangotest/manage.py", line 22, in <module>

    execute_from_command_line(sys.argv)

  File "/Users/lyx/PycharmProjects/djangotest/venv/lib/python2.7/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line

    utility.execute()

  File "/Users/lyx/PycharmProjects/djangotest/venv/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute

    django.setup()

  File "/Users/lyx/PycharmProjects/djangotest/venv/lib/python2.7/site-packages/django/__init__.py", line 27, in setup

    apps.populate(settings.INSTALLED_APPS)

  File "/Users/lyx/PycharmProjects/djangotest/venv/lib/python2.7/site-packages/django/apps/registry.py", line 85, in populate

    app_config = AppConfig.create(entry)

  File "/Users/lyx/PycharmProjects/djangotest/venv/lib/python2.7/site-packages/django/apps/config.py", line 94, in create

    module = import_module(entry)

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module

    __import__(name)

ImportError: No module named message

Process finished with exit code 1

已经添加过installed_app