python - makemigrations 无法识别数据库更改

Question

我正在使用django，现在我将python文件从custom_fields重命名为fields并更改模型类和模型类正在使用来自 fields 文件的字段，但是当我运行

python manage.py makemigrations

存在这样的错误:

Traceback (most recent call last):
File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
File "/Users/smy/wuque/projects/LinuxChat/Server/lib/python2.7/site-packages/django/core/management/__init__.py", line 350, in execute_from_command_line
    utility.execute()
File "/Users/smy/wuque/projects/LinuxChat/Server/lib/python2.7/site-packages/django/core/management/__init__.py", line 342, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/smy/wuque/projects/LinuxChat/Server/lib/python2.7/site-packages/django/core/management/base.py", line 348, in run_from_argv
    self.execute(*args, **cmd_options)
File "/Users/smy/wuque/projects/LinuxChat/Server/lib/python2.7/site-packages/django/core/management/base.py", line 399, in execute
    output = self.handle(*args, **options)
File "/Users/smy/wuque/projects/LinuxChat/Server/lib/python2.7/site-packages/django/core/management/commands/makemigrations.py", line 65, in handle
    loader = MigrationLoader(None, ignore_no_migrations=True)
File "/Users/smy/wuque/projects/LinuxChat/Server/lib/python2.7/site-packages/django/db/migrations/loader.py", line 49, in __init__
    self.build_graph()
File "/Users/smy/wuque/projects/LinuxChat/Server/lib/python2.7/site-packages/django/db/migrations/loader.py", line 170, in build_graph
    self.load_disk()
File "/Users/smy/wuque/projects/LinuxChat/Server/lib/python2.7/site-packages/django/db/migrations/loader.py", line 105, in load_disk
    migration_module = import_module("%s.%s" % (module_name, migration_name))
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
File "/Users/smy/wuque/projects/LinuxChat/Server/LinuxChatServer/Server/migrations/0005_auto_20151215_1223.py", line 5, in <module>
    import Server.custom_fields
ImportError: No module named custom_fields

我不知道如何解决这个错误，所以我尝试删除 migrates 文件夹，但是当我再次运行上面的命令时，没有检测到任何更改，即使我再次修改模型类。只需显示:

No changes detected.

现在我无法修改数据库表，谁能告诉我如何解决这个问题？谢谢!

Answer 1

makemigrations 用于应用将直接影响数据库底层结构的更改。

重命名你的Python文件不会对数据库产生任何影响，因为字段的类型没有改变，因此不会对数据库产生任何影响。您最终看到的只是 python 文件中的不同导入。