我的HAML模板的帮助器出了什么问题？
def display_event(event)
event = MultiJson.decode(event)
markup_class = get_markup_class(event)
haml_tag :li,:class => markup_class do
haml_tag :b,"Foo"
haml_tag :i,"Bar"
end
end
这是错误：
haml_tag outputs directly to the Haml template. Disregard its return value and use the - operator,or use capture_haml to get the value as a String.
模板调用display_event,如下所示：
- @events.each do |event|
= display_event(event)
%li.fooclass %b Foo %i Bar
解决方法
错误消息中的线索：
Disregard its return value and use the - operator,or use capture_haml to get the value as a String.
来自haml_tag的文档：
haml_tagoutputs directly to the buffer; its return value should not be used. If you need to get the results as a string,use#capture_haml.
要修复它,要么将Haml更改为：
- @events.each do |event| - display_event(event)
(即使用 – 运算符而不是=),或更改方法以使用capture_haml：
def display_event()
event = MultiJson.decode(event)
markup_class = get_markup_class(event)
capture_haml do
haml_tag :li,"Bar"
end
end
end