在哪里放Django启动代码？ [英] Where to put Django startup code?

问题描述

我想在服务器启动（开发和生产）上执行这些代码行：

I'd like to have these lines of code executed on server startup (both development and production):

from django.core import management
management.call_command('syncdb', interactive=False)

它在 settings.py 中不起作用，因为它需要设置才能加载。

Putting it in settings.py doesn't work, as it requires the settings to be loaded already.

将它们在外部查看和访问该视图也不起作用，因为有一些使用数据库的中间件，那些将失败，不让我访问视图。

Putting them in a view and accessing that view externally doesn't work either, as there are some middlewares that use the database and those will fail and not let me access the view.

把它们放在一个中间件中可以工作，但每次访问我的应用程序时都会调用它。一个可能的解决方案可能是创建一个完成所有工作的中间件，然后从 MIDDLEWARE_CLASSES 中删除​​它，因此它不再被调用。可以在没有太多猴子修补的情况下执行此操作吗？

Putting them in a middleware would work, but that would get called each time my app is accessed. An possible solution might be to create a middleware that does all the job and then removes itself from MIDDLEWARE_CLASSES so it's not called anymore. Can I do that without too much monkey-patching?

推荐答案

在 __ init __ ，然后从 __ init __ 中引用 django.core.exceptions.MiddlewareNotUsed ，django将其删除对于所有请求:)。 __ init __ 在启动时被调用，而不是在第一个请求，所以它不会阻止您的第一个用户。

Write middleware that does this in __init__ and afterwards raise django.core.exceptions.MiddlewareNotUsed from the __init__, django will remove it for all requests :). __init__ is called at startup by the way, not at the first request, so it won't block your first user.

有关于添加启动信号的说法，但是不久以后就可以使用（例如，一个主要问题是发送此信号）

There is talk about adding a startup signal, but that won't be available soon (a major problem for example is when this signal should be sent)

相关机票： https://code.djangoproject.com/ticket/13024

更新： Django 1.7包括对此的支持。 （文档，由票）

Update: Django 1.7 includes support for this. (Documentation, as linked by the ticket)

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