当我尝试运行迁移时，我得到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
？我刚刚添加了新应用。
不知道要看什么方向。回溯：
AR -o .build_release/lib/libcaffe.a
LD -o .build_release/lib/libcaffe.so.1.0.0
/usr/bin/ld: cannot find -lhdf5_hl
/usr/bin/ld: cannot find -lhdf5
collect2: error: ld returned 1 exit status
Makefile:572: recipe for target '.build_release/lib/libcaffe.so.1.0.0' failed
make: *** [.build_release/lib/libcaffe.so.1.0.0] Error 1
答案 0 :(得分：5)
如果上述应用程序中的BadMigrationError: "Migration *** in app *** has no Migration class"目录（＆＃34;费用＆＃34;）包含一个文件（＆＃34; urls.py＆＃34;），则会引发异常"migrations/" 不是有效的迁移文件。