[英]haml_tag outputs directly to the Haml template
What am I doing wrong with this helper for my HAML template? 我的HAML模板的帮助器我做错了什么?
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
This is the error: 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.
The template is calling display_event like this: 模板调用display_event,如下所示:
- @events.each do |event|
= display_event(event)
If I was using regular markup it would expand to the following 如果我使用常规标记,它将扩展到以下内容
%li.fooclass
%b Foo
%i Bar
The clue's in the error message: 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.
From the docs for haml_tag
: 来自haml_tag
的文档:
haml_tag
outputs directly to the buffer;haml_tag
直接输出到缓冲区; its return value should not be used. 不应使用其返回值。 If you need to get the results as a string, use#capture_haml
. 如果需要将结果作为字符串获取,请使用#capture_haml
。
To fix it, either change your Haml to: 要解决此问题,请将Haml更改为:
- @events.each do |event|
- display_event(event)
(ie use the -
operator instead of =
), or change the method to use capture_haml
: (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, :class => markup_class do
haml_tag :b, "Foo"
haml_tag :i, "Bar"
end
end
end
This will make the method return a string, which you can then display with =
in your Haml. 这将使该方法返回一个字符串,然后您可以在Haml中显示=
。
Note you need to make only one of these changes, if you make both they will cancel each other out and you'll get nothing displayed. 请注意,您只需要进行其中一项更改,如果同时进行这两项更改,它们将相互取消,您将无法显示任何内容。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.