Ruby-on-rails 如何在动态链接中使用 HAML？
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How do I use HAML in a dynamic link?
提问by Arihant Godha
I am trying to create a link using HAML which looks like the this
我正在尝试使用 HAML 创建一个链接，看起来像这样
=link_to("Last updated on<%=@last_data.date_from.month %>",'/member/abc/def?month={Time.now.month}&range=xyz&year={Time.now.year}')
It is not taking the Ruby code and it is displaying that as a string
它没有采用 Ruby 代码，而是将其显示为字符串
Last updated on<%=@last_data.date_from.month %>
最后更新于<%=@last_data.date_from.month %>
and in the URL as well it is not taking the function Time.now.monthor Time.now.year.
并且在 URL 中它也没有采用函数Time.now.month或Time.now.year.
How do I pass Ruby code in URL and in the string ?
如何在 URL 和字符串中传递 Ruby 代码？
回答by Ji?í Pospí?il
You should probably use something like this:
你可能应该使用这样的东西：
= link_to("Last updated on #{@last_data.date_from.month}", "/member/abc/def?month=#{Time.now.month}&range=xyz&year=#{Time.now.year}")
Note that in the second string, it's necessary to change the 'to ". Also if the link text is getting long, you can use something like this:
请注意，在第二个字符串中，有必要将 更改'为"。此外，如果链接文本变长，您可以使用以下内容：
= link_to("/member/abc/def?month=#{Time.now.month}&range=xyz&year=#{Time.now.year}") do
Last updated on #{@last_data.date_from.month}
回答by Gosha Arinich
Everything after the =in HAML is a Ruby expression. Ruby doesn't interpolate strings the way HAML does, it has own way of such interpolation.
=in HAML之后的所有内容都是 Ruby 表达式。Ruby 不像 HAML 那样插入字符串，它有自己的这种插入方式。
In Ruby, when you want to have string value of some variable inside another string, you could do.
在 Ruby 中，当您想在另一个字符串中包含某个变量的字符串值时，您可以这样做。
"Some string #{Time.now}"
So, it should be:
所以，应该是：
= link_to "Last updated on #{@last_data.date_from.month}", "/member/abc/def?month=#{Time.now.month}&range=xyz&year=#{Time.now.year}"
回答by imechemi
A simple example with easy syntax:
一个简单的语法示例：
link_to "Profile #{rubycode}", "profile_path(@profile)/#{ruby_code}", class: "active"
