应用程序中的迁移 url ...没有迁移 class

Question

当我尝试运行迁移时，我得到 "Migration urls in app *** has no Migration class"？我刚刚添加了新应用。

不知道往哪个方向看。回溯：

C:\Users\PAPA\DEV\liberty\lib\site-packages\django\db\models\__init__.py:55:
RemovedInDjango19Warning: The utilities in django.db.models.loading are deprecated 
in favor of the new application loading system.
from . import loading

Traceback (most recent call last):   File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
File "...\django\core\management\__init__.py", line 338, in execute_from_command_line
    utility.execute()
File "...\django\core\management\__init__.py", line 330, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
File "...\django\core\management\base.py", line 390, in run_from_argv
    self.execute(*args, **cmd_options)
File "...\django\core\management\base.py", line 441, in execute
    output = self.handle(*args, **options)
File "...\django\core\management\commands\makemigrations.py", line 63, in handle
    loader = MigrationLoader(None, ignore_no_migrations=True)
File "...\django\db\migrations\loader.py", line 47, in __init__
    self.build_graph()
File "...\django\db\migrations\loader.py", line 174, in build_graph
    self.load_disk()
File "...\django\db\migrations\loader.py", line 109, in load_disk
    "Migration %s in app %s has no Migration class" % (migration_name, app_config.label)
django.db.migrations.loader.BadMigrationError: Migration urls in app expense has no
Migration class

Answer 1

那个例外
BadMigrationError: "Migration *** in app *** has no Migration class"
如果应用程序的 "migrations/" 目录包含一个文件 不是有效的迁移文件 .

则引发

在您的情况下，它是应用程序 "expense" 迁移中的一个文件 "urls.py"。

应用程序中的迁移 url ...没有迁移 class

Migration urls in app ...has no Migration class

django

django-migrations