I'm returning a string body_class to my view. I can't seem to put in a condition without breaking it:
<body tal:condition="body_class" class="${body_class}">
<body tal:condition="not body_class">
Kinda works. It outputs the body class but the rest of the template doesn't work. I'm looking for a solution that puts in the body class if the string exists, otherwise leaves it out.
Dunno what I'm doing wrong.
I suppose your talking about a browser view (BorwserView).
Something like that should work if body_class is a method of your BrowserView:
<body tal:condition="view/body_class" class="${view/body_class}">
...
</body>
<body tal:condition="not: view/body_class">
...
</body>
你不想在tal:condition这里使用；您正在打开或关闭整个元素，包括内容。
您只想设置类属性：
<body tal:attributes="class: body_class">
这适用于空字符串，你只会得到一个空class元素；如果body_class是None，则该属性将被完全省略。