Django 迁移在 Heroku 中失败

Posted 2023-02-24

【中文标题】Django 迁移在 Heroku 中失败

【英文标题】：Django migrations fail in heroku

【发布时间】：2015-06-26 06:21:44

【问题描述】：

我正在尝试将 Django (1.8) 应用程序部署到 Heroku，运行时 Python 3.4.2。该应用程序成功运行（除了未创建表的事实），但在尝试运行 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。

【问题讨论】：

您安装的应用中有authentication吗？

是的，身份验证在已安装的应用程序中。

【参考方案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 上运行python manage.py migrate 而不是python manage.py syncdb。请参阅docs。

【讨论】：

我也有同样的问题。我该如何处理我的 virtualenv 中的 django 应用程序的迁移？也许这不是我的问题，我不确定。

尝试 heroku run python manage.py migrate。这将迁移生产机器的 virtualenv 中的应用程序。

【参考方案2】：

我不得不进入heroku的机器bash：

heroku run bash

然后制作makemigrations:

heroku run python manage.py makemigrations

最后，

heroku run python manage.py migrate

【参考方案3】：

对我来说，我通过使用我们在本地服务器中使用的带有前缀“heroku run”的相同命令解决了这个问题..

例如：-

python manage.py makemigrations 

它可以在我们的本地工作，但对于 heroku，像这样：-

heroku run python manage.py makemigrations