Django版本1.5：'url'需要一个非空的第一个参数。 Django 1.5中的语法已更改 [英] Django release 1.5: 'url' requires a non-empty first argument. The syntax changed in Django 1.5
问题描述
我开始使用Django版本1.5，并且遇到了旧代码的问题：
I started using Django release 1.5 and got a problem with my old code:
<a href="{% url auto.views.viewpost post.slug %}"><h3>{{post.title}}</h3></a>
错误：'url'需要一个非空的第一个参数。 Django 1.5中的语法已更改，请参阅文档。
文档：
Error: 'url' requires a non-empty first argument. The syntax changed in Django 1.5, see the docs. Docs:
值得注意的一个不推荐的功能是转向new-styleurl
标签。在Django 1.3之前，像{％url myview％}这样的语法被解释为
不正确（Django将myview视为
视图的文字名称，而不是名为myview的模板变量）。 Django 1.3及以上
引入了{％加载url从未来％}语法引入
更正的行为，其中myview被视为一个变量。
One deprecated feature worth noting is the shift to "new-style" url tag. Prior to Django 1.3, syntax like {% url myview %} was interpreted incorrectly (Django considered "myview" to be a literal name of a view, not a template variable named myview). Django 1.3 and above introduced the {% load url from future %} syntax to bring in the corrected behavior where myview was seen as a variable.
其结果是，如果您不在模板中使用{$ load
future％}的{％load url），则需要将{％url
myview％}之类的代码更改为{％ urlmyview％}。如果您使用{$ load $ url from
future％}，可以在Django 1.5下简单地删除该行。
The upshot of this is that if you are not using {% load url from future %} in your templates, you’ll need to change tags like {% url myview %} to {% url "myview" %}. If you were using {% load url from future %} you can simply remove that line under Django 1.5
然后我尝试：
< a href ={％url'auto.views.view_post'post.slug％}>< h3> {{post.title}}< / h3>< / a>
但是没有找到带有参数'（''，'''和关键字参数'{}'的'auto.views.view_post'的错误。 （
我做错了什么？
Thx！
Then I tried:
<a href="{% url ‘auto.views.view_post’ post.slug %}"><h3>{{post.title}}</h3></a>
but got error Reverse for ‘auto.views.view_post’ with arguments ‘(’',)' and keyword arguments ‘{}’ not found. :(
What am I doing wrong?
Thx!
推荐答案
我真的很讨厌做这些垃圾所以我写了一个sed脚本来为我做，确保先备份一个备份，然后在你的模板目录中运行：
I really hate doing all this junk by hand, so I wrote a sed script to do it for me. Make sure you have a backup first, then run this in your templates directory:
find . -type f -print0 | xargs -0 sed -i 's/{% url \([^" >][^ >]*\)/{% url "\1"/g'
它将通过所有的模板文件并替换为： p>
It'll go through all of your template files and replace this:
{% url something.else foo bar %}
与此
{% url "something.else" foo bar %}
小心，我有点懒惰，可能会打破一些构造，它仍然会尽管如此，您可以轻松找到差异中的错误，而不是手动执行错误。
Be careful, I was a little lazy with this, it might break on some constructs. It's still going to be easier looking for errors in a diff than doing it by hand, though.
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