Rails/Bootstrap/HAML - 如何转换此代码以显示闪存消息到HAML？

Question

我想将以下代码转换为HAML,以处理Rails 4.2.2应用程序中的Bootstrap警报消息.我已尝试手动,使用html2haml和在线转换器,我得到的代码永远不会工作.

代码:

<div class="alert 
    <%= 
    case type.to_sym 
    when :alert, :danger, :error, :validation_errors
        'alert-danger'
    when :warning, :todo
        'alert-warning'
    when :notice, :success
        'alert-success'
    else 
    'alert-info'
    end
    %>
     alert-dismissible" role="alert">
    <button type="button" class="close" data-dismiss="alert"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
    <%= content %>
</div>

这是我从转换器得到的:

.alert.case.when.:validation_errors.when.:todo.when.:success.else.end.alert-dismissible{:class => "<haml_loud> type.to_sym :alert, :danger, :error, 'alert-danger' :warning, 'alert-warning' :notice, 'alert-success' 'alert-info' </haml_loud>", :role => "alert"}
  %button.close{"data-dismiss" => "alert", :type => "button"}
    %span{"aria-hidden" => "true"} ×
    %span.sr-only Close
  = content

我知道它很丑,但它是我发现的唯一一个与Bootstrap 3.5.5开箱即用的代码.如果有人对使用HAML的新代码有建议,我愿意听.

Answer 1

如果你想将多行Ruby代码放在HTML元素的属性中,HAML并不是很好.无论如何,这被认为是一种不好的做法,因为它使你的视图变得复杂,所以我宁愿使用帮助器来简化视图.例如,您可以创建一个helpers/alert_helper.rb文件.

助手/ alert_helper.rb

module AlertHelper
  def build_alert_classes(alert_type)
    classes = 'alert alert-dismissable '
    case alert_type.to_sym 
    when :alert, :danger, :error, :validation_errors
        classes += 'alert-danger'
    when :warning, :todo
        classes += 'alert-warning'
    when :notice, :success
        classes += 'alert-success'
    else 
        classes += 'alert-info'
    end
  end
end

那么在你看来,它会变成这样:

视图

%div{ class: build_alert_classes(type), role: "alert" }
  %button.close{ type: "button", "data-dismiss" => "alert" }
    %span{ "aria-hidden" => true } ×
    %span.sr-only Close
  = content