检查网址是否匹配模板 [英] Check if url matches in template

问题描述

解决方案

这是你想要的东西通常希望在一个views.py文件中使用反向（）帮助具有已知参数的命名URL或解析 （）的路径。

如果您在模板中确实需要此功能，这里是一个恶意的解决方案：

  @ register.simple_tag 
 def urlpath_exists（name）：
为成功解析（）'返回True
 try ：
 return bool（resolve（path））
除了Resolver404：
返回False 
  

注意：这并不能保证网址有效，只是出现了匹配模式。

Is it possible to check in template that some url match any pattern from urls?

解决方案

This is something you'd normally want to do in a views.py file with the reverse() helper for named URLs with known args or resolve() for paths.

If you do need this functionality in a template specifically, here is a hacky solution:

@register.simple_tag
def urlpath_exists(name):
    """Returns True for successful resolves()'s."""
    try:
        return bool(resolve(path))
    except Resolver404:
        return False

Note: this doesn't guarantee that the URL is valid, just that there was a pattern match.

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