Django 迁移在 heroku 中失败

Question

我正在尝试将 Django (1.8) 应用程序部署到 Heroku，运行时间 Python 3.4.2。应用程序运行成功（除了未创建表的事实），但是在尝试运行 syncdb 时出现以下错误：

Running `python manage.py syncdb` attached to terminal... up, run.5851
/app/.heroku/python/lib/python3.4/site-packages/django/core/management       
/commands/syncdb.py:24: RemovedInDjango19Warning: The syncdb command 
will be removed in Django 1.9
warnings.warn("The syncdb command will be removed in Django 1.9", RemovedInDjango19Warning)

Traceback (most recent call last):
File "/app/.heroku/python/lib/python3.4/site-packages/django/db/migrations/loader.py", line 157, in check_key
return list(self.graph.root_nodes(key[0]))[0]
IndexError: list index out of range

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/app/.heroku/python/lib/python3.4/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
utility.execute()
File "/app/.heroku/python/lib/python3.4/site-packages/django /core/management/__init__.py", line 330, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/app/.heroku/python/lib/python3.4/site-packages/django/core/management/base.py", line 390, in run_from_argv
self.execute(*args, **cmd_options)
File "/app/.heroku/python/lib/python3.4/site-packages/django/core/management/base.py", line 441, in execute
output = self.handle(*args, **options)
File "/app/.heroku/python/lib/python3.4/site-packages/django/core/management/commands/syncdb.py", line 25, in handle
call_command("migrate", **options)
File "/app/.heroku/python/lib/python3.4/site-packages/django/core/management/__init__.py", line 120, in call_command
return command.execute(*args, **defaults)
File "/app/.heroku/python/lib/python3.4/site-packages/django/core/management/base.py", line 441, in execute
output = self.handle(*args, **options)
File "/app/.heroku/python/lib/python3.4/site-packages/django/core/management/commands/migrate.py", line 93, in handle
executor = MigrationExecutor(connection, self.migration_progress_callback)
File "/app/.heroku/python/lib/python3.4/site-packages/django/db/migrations/executor.py", line 19, in __init__
self.loader = MigrationLoader(self.connection)
File "/app/.heroku/python/lib/python3.4/site-packages/django/db/migrations/loader.py", line 47, in __init__
self.build_graph()
File "/app/.heroku/python/lib/python3.4/site-packages/django/db/migrations/loader.py", line 287, in build_graph
parent = self.check_key(parent, key[0])
File "/app/.heroku/python/lib/python3.4/site-packages/django/db/migrations/loader.py", line 164, in check_key
raise ValueError("Dependency on app with no migrations: %s" % key[0])
ValueError: Dependency on app with no migrations: authentication

我正在使用 sqlite。

Answer 1

在您的开发机器上，使用 python manage.py makemigrations 创建您的迁移。然后，假设您的迁移文件夹被推送到 heroku，在 heroku 运行 python manage.py migrate 而不是 python manage.py syncdb 上。见 docs.

Answer 2

对我来说，我通过使用我们在本地服务器中使用的相同命令解决了这个问题，前缀为 "heroku run" 就是这样。

例如：-

python manage.py makemigrations

它会在我们的本地工作，但对于 heroku，就像这样:-

heroku run python manage.py makemigrations

Answer 3

我不得不进入heroku的机器bash :

heroku run bash

然后makemigrations:

heroku run python manage.py makemigrations

最后，

heroku run python manage.py migrate

Django 迁移在 heroku 中失败

Django migrations fail in heroku

django

heroku

django-migrations