Rails助手类

时间:2019-03-31 11:24:51

标签: ruby-on-rails class helper

我发现自己在写助手,以使我的观点非常清晰。但是,助手并不自然而然地成为类,而只是模块内部的一组方法。结果,这些方法不会像使用params进行初始化那样共享数据。因此,我最终多次传递数据。它很烦人。有没有办法在共享价值的课程中放一个课程?

这是我要弄干的一个例子-是的,它离最佳代码还很远,请只关注我要解决的问题;我不想浪费时间做一个完美的例子。在下面,传递了选项,但最终我将其传递给其他方法,等等。

module Dashboard::DashboardHelper
    def menu_item(link_ref, options={})
        title           = options.fetch(:title,     "")
        details         = options.fetch(:details,   "")
        highlight       = options.fetch(:highlight,     false)
        icon            = options.fetch(:icon,      "")
        first           = options.fetch(:first,     false)
        subs            = options.fetch(:subs, [])
        link_item_class = (first) ? "m-t-30" : " "

        content_tag(:li, 
                    menu_link_label(link_ref,title,details,icon,highlight), 
                    class: link_item_class
        )
    end

    def menu_link_label(link_ref, title, details, icon, highlight)
        link_to(menu_labels(title,details), link_ref, class: "detailed") +
        icon_thumbnail(icon,highlight)
    end

    def menu_labels(title, details)
        content_tag(:span, title, class: "title") +
        content_tag(:span, details, class: "details")       
    end

    def icon_thumbnail(name, family, highlight=true)
        classes = (highlight) ? "bg-success icon-thumbnail" : "icon-thumbnail"
        content_tag(:span,icon(name, family), class: classes)
    end

    def icon(name)
        (name.present?) ? content_tag(:i, nil, class:"fas fa-#{name}") : ""
    end
end

编辑:

选项哈希通常直接来自视图,格式如下:

<%= menu_item dashboard_root_path, 
    title: "Dashboard", 
    details: "12 New Updates", 
    icon: "fe:home",
    first: true,
    highlight: true
%>

1 个答案:

答案 0 :(得分:2)

没有什么可以阻止您自己开设一些课程,例如app/view_helpers并在您的视图中使用它们

# app/view_helpers/menu.rb
class Menu
  attr_accessor :options
  def initialize(options={})
    # do something with your options
    # self.options[:header] = options.fetch(:header, '')
  end

  def header
    # use your options here
    content_tag(:h1, options[:header])
  end
end


# some_controller.rb
def index
  @menu = Menu.new
end


# index.html.erb
<%= @menu.header %>