blocks|key|534725|text|有一个文档可以解决这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|534726|https://docs.djangoproject.com/en/dev/topics/http/urls/#reverse-resolution-of-urls|offset|length|534727|它可用于为给定视图生成URL|534728|主要优点是您不需要在代码中硬编码路由。|534729|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|2A|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@$D|S|E|T|1|U]]|A|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|W|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|C]]]]

There is a doc for that

<a href="https://docs.djangoproject.com/en/dev/topics/http/urls/#reverse-resolution-of-urls" rel="nofollow noreferrer">https://docs.djangoproject.com/en/dev/topics/http/urls/#reverse-resolution-of-urls</a>

it can be used to generate an URL for a given view

main advantage is that you do not hard code routes in your code.

blocks|key|317904|text|reverse()用于遵循django+DRY原则，即如果您将来更改url，则可以使用反向(Urlname)引用该url。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|317905|entityMap^0|0|9|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

The <code>reverse()</code> is used to adhere the django DRY principle i.e if you change the url in future then you can reference that url using reverse(urlname).

blocks|key|534819|text|该函数支持dry原则-确保您不会在整个应用程序中硬编码urls。一个url应该定义在一个地方，并且只有一个地方-你的url+conf。在那之后，你真的只是参考了这些信息。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|534820|在给定视图路径或url配置文件中的page_name参数的情况下，使用reverse()提供页面的url。在模板中使用{%25+url+'my-page'+%25}没有意义的情况下，您可以使用它。|offset|length|style|CODE|534821|有很多地方你可能会用到这个功能。我发现我使用它的一个地方是在视图中重定向用户时(通常在成功处理表单之后)-|534822|return+HttpResponseRedirect(reverse('thanks-we-got-your-form-page'))|534823|您也可以在编写模板标记时使用它。|534824|我使用reverse()的另一次是模型继承。我在父模型上有一个ListView，但是想要从这些父对象中的任何一个获取到它的相关子对象的DetailView。我将一个get__child_url()函数附加到父对象上，该函数标识子对象的存在，并使用reverse()返回其DetailView的url。|534825|entityMap^0|0|Z|9|1N|J|0|0|0|1W|0|0|3|9|2A|G|3F|9|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]|$D|V|E|W|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|11|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|12|8|@$D|13|E|14|F|G]|$D|15|E|16|F|G]|$D|17|E|18|F|G]]|9|@]|A|$]]|$1|P|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|Q|$]]

The function supports the dry principle - ensuring that you don't hard code urls throughout your app. A url should be defined in one place, and only one place - your url conf. After that you're really just referencing that info.

Use <code>reverse()</code> to give you the url of a page, given either the path to the view, or the page_name parameter from your url conf. You would use it in cases where it doesn't make sense to do it in the template with <code>{% url 'my-page' %}</code>.

There are lots of possible places you might use this functionality. One place I've found I use it is when redirecting users in a view (often after the successful processing of a form)-

<code>return HttpResponseRedirect(reverse('thanks-we-got-your-form-page'))</code>

You might also use it when writing template tags.

Another time I used <code>reverse()</code> was with model inheritance. I had a ListView on a parent model, but wanted to get from any one of those parent objects to the DetailView of it's associated child object. I attached a <code>get__child_url()</code> function to the parent which identified the existence of a child and returned the url of it's DetailView using <code>reverse()</code>.

blocks|key|318024|text|现有的答案是相当清楚的。以防您不知道它为什么被称为reverse：它接受url名称的输入，并给出实际的url，这与先有一个url，然后再给它一个名称是相反的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|318025|entityMap^0|P|7|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

The existing answers are quite clear. Just in case you do not know why it is called <code>reverse</code>: It takes an input of a url name and gives the actual url, which is reverse to having a url first and then give it a name.

When I read Django code sometimes, I see in some templates <code>reverse()</code>. I am not quite sure what this is but it is used together with HttpResponseRedirect. How and when is this <code>reverse()</code> supposed to be used?

What is reverse()?

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当我有时阅读Django代码时，我在一些模板中看到了reverse()。我不太确定这是什么，但它与HttpResponseRedirect一起使用。这个reverse()应该如何使用，什么时候使用？

问什么是reverse()？
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