带有表单的Rails 4自定义帮助器方法无法在视图中获得输出-完全 [英] Rails 4 custom helper method with form doesn't get output in view - fully

问题描述

在application_helper.rb中有此选项，因为我对许多模型使用相同的过滤器形式.

I have this in application_helper.rb because I use the same filter form for a number of models.

def filter_form(path, filter_options, button)
    form_tag(path, remote: true, method: "get") do 
      label_tag(:filter, "Filter by")
      select_tag(:filter_type, options_for_select(filter_options))
      "<span>for:</span>".html_safe
      text_field_tag(:filter)
      button_tag(:submit, "Submit") if button == true
    end
  end

例如在我的用户文章中

<%= filter_form(articles_path, @filter_options, false) %>

但是在代码中我只能看到它生成了<form action="/articles" accept-charset="UTF-8" data-remote="true" method="get"><input name="utf8" value="✓" type="hidden"></form>标记，这很好，但是没有任何表单元素显示.为什么会这样?

However in the code I can see it only generates the <form action="/articles" accept-charset="UTF-8" data-remote="true" method="get"><input name="utf8" value="✓" type="hidden"></form> tag which is all fine and good but none of the form elements show up. Why is that?

推荐答案

尝试使用 concat

Try using concat

def filter_form(path, filter_options, button)
   form_tag(path, remote: true, method: "get") do 
     concat label_tag(:filter, "Filter by")
     concat select_tag(:filter_type, options_for_select(filter_options))
     "<span>for:</span>".html_safe
     concat text_field_tag(:filter)
     concat button_tag(:submit, "Submit") if button == true
   end
end

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