通过有限的选择将Django中的观点转化为参考 [英] Passing arguments to views in Django from constrained choices

问题描述

我正在寻找从URL传递两个参数的最佳方法，而不允许任何其他参数。

I am looking for the best way to pass either of two arguments to the views from the URL, without allowing any additional arguments.

例如，使用以下内容URL：

For example, with the following URLs:

(r'^friends/requests', 'app.views.pendingFriends'),

(r'^friends/offers', 'app.views.pendingFriends'),

如果可以将URL传递给视图，以便 pendingFriends 知道哪个URL被调用，这将工作。但是，我看不到这样做。

If it's possible to pass the URL to the views, so that pendingFriends knows which URL it was called from, that would work. However, I can't see a way to do this.

相反，我可以提供参数（请求或提供）到单个Django视图

Instead, I could supply the arguments (requests or offers) in the URL, to a single Django view,

(r'^friends/(?P<type>\w+', 'app.views.pendingFriends'),

该参数将告诉 pendingFriends 该做什么，但这样会让其他参数传递给URL的可能性（除了请求和提供。）

The argument will tell pendingFriends what to do. However, this leaves open the possibility of other arguments being passed to the URL (besides requests and offers.)

理想情况下，我希望URL调度程序停止这是在无效参数传递给视图之前发生的（通过404），所以我的问题是（a）这是最好的方法，（b）是否有一种方法来限制传递给URL中的视图的参数到请求或提供？

Ideally I'd like the URL dispatcher to stop this happening (via a 404) before the invalid arguments get passed to the views. So my questions are (a) is this the best approach, (b) is there a way to constrain the arguments which are passed to the views in the URL to requests or offers?

谢谢

推荐答案

请记住，您有足够的正则表达式来匹配URL。只需要写一个只接受你想要的正则表达式：

Remember that you have the full power of regexes to match URLs. You simply need to write a regex that accepts only what you want:

(r'^friends/(?P<type>requests|offers)', 'app.views.pendingFriends'),

如果要列出两次，这样做：

If you want to list it twice, do it like this:

(r'^friends/(?P<type>requests)', 'app.views.pendingFriends'),
(r'^friends/(?P<type>offers)', 'app.views.pendingFriends'),

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