ruby-on-rails - 在 Controller 中使用 using 方法测试辅助方法

Question

module ApplicationHelper

def sortable(column, title = nil)
title ||= column
css_class = column == sort_column ? "current #{sort_direction}" : nil
direction = column == sort_column && sort_direction == "asc" ? "desc" : "asc"
sort_arrow = ""
if(column == sort_column)
  if(direction == "desc")
    sort_arrow = "▼"
  elsif(direction == "asc")
    sort_arrow = "▲"
  end
end
link_to sort_arrow+title, {:sort => column, :direction => direction,
                :search_form => @search_form.attributes
}, {:class => css_class}

 end
end

以上是我想测试的方法，问题是 sort_column 方法在 Controller 上，因此我收到错误消息 method does not exist .我如何摆脱它或如何让 Controller 执行该方法？

编辑: Controller :

class ResultsController < ApplicationController
 def sort_column
  params[:sort] != nil ? params[:sort] : 'ID'
 end
end

Answer 1

简单的方法:使用 helper_method 声明将 sortable 方法移动到 ResultsController。

class ResultsController < ApplicationController
  helper_method :sortable

  def sort_column
    params[:sort] != nil ? params[:sort] : 'ID'
  end

  def sortable(column, title = nil)
    title ||= column
    css_class = column == sort_column ? "current #{sort_direction}" : nil
    direction = column == sort_column && sort_direction == "asc" ? "desc" : "asc"
    sort_arrow = ""
    if(column == sort_column)
      if(direction == "desc")
        sort_arrow = "▼"
      elsif(direction == "asc")
        sort_arrow = "▲"
      end
    end
    link_to sort_arrow + title,
            {:sort => column, :direction => direction,
             :search_form => @search_form.attributes},
            {:class => css_class}

  end
end