用装饰器覆盖Django视图 [英] Overriding Django views with decorators

问题描述

我有一种情况，需要将已经登录的用户从登录页面重定向到另一个页面。我已经看到提到这可以通过装饰器来实现，但是我使用它是相当新的。但是，我使用django登录和第三方视图（从django注册）。我不想更改django.contrib.auth或django注册中的任何代码。为了获得所需的行为，我如何将装饰器应用于不被修改的视图。

I have a situation that requires redirecting users who are already logged in away from the login page to another page. I have seen mention that this can be accomplished with decorators which makes sense, but I am fairly new to using them. However, I am using the django login and a third party view (from django-registration). I do not want to change any of the code in django.contrib.auth or django-registration. How can I apply a decorator to a view that is not to be modified in order to get the desired behavior.

提前感谢！

更新：我发现我错误地将登录功能与注册模块相关联。 django注册与这个问题无关。但是，我仍然需要覆盖默认的login（）行为。任何想法？

UPDATE: I discovered that I mistakenly associated the login function with the registration module. django-registration has nothing to do with this issue. However, I still need to be able to override default login() behavior. Any thoughts?

推荐答案

有三种方法可以实现，虽然您需要使用自己的urlconf来实现这些功能： p>

Three more ways to do it, though you'll need to use your own urlconf for these:

1. 直接在urlconf中将修饰器添加到视图中：

1. Add the decorator to the view directly in the urlconf:

...
(regexp, decorator(view)),
...

你需要将视图和装饰器导入urlconf，这就是为什么我不喜欢这个。我更喜欢在我的urls.py中输入尽可能少的导入。

You need to import the view and the decorator into the urlconf though, which is why I don't like this one. I prefer to have as few imports in my urls.py's as possible.

将视图导入< app> / views .py 并在其中添加装饰器：

Import the view into an <app>/views.py and add the decorator there:

import view

view = decorator(view)

非常像Vinay的方法，因为你需要一个urlconf更加明确。

Pretty much like Vinay's method though more explicit since you need an urlconf for it.

将视图包裹在新视图中：

Wrap the view in a new view:

import view

@decorator
def wrapperview(request, *args, **kwargs):
    ... other stuff ...
    return view(request, *args, **kwargs)

最后一个在您需要更改通用视图时非常方便。这是我经常最终做的。

The last one is very handy when you need to change generic views. This is what I often end up doing anyway.

每当你使用urlconf，模式的顺序都很重要，所以你可能需要首先调用哪个模式被调用。

Whenever you use an urlconf, order of patterns matter, so you might need to shuffle around on which pattern gets called first.

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