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作为 Ruby on rails 的新手，我偶然发现了我的应用程序的一部分。我阅读了 RoR 框架的基础知识，并了解 Rails MVC 的“约定优于配置”功能。我有两张表，一张是apps_events，另一张是apps_events_attributes。第一个的id是第二个的外键，in有很多关系。app_events 表有一个外键属性“app_id”的字段，因此在选择特定应用程序时，我将被重定向到它的事件和属性。还有一个名为“is_standard”的字段，它实际上区分事件类型是标准事件还是自定义事件。

现在，我必须使用nested_form_for 功能在视图层的两个不同选项卡中呈现特定应用程序的这些事件及其属性，并使用其属性。用户可以通过此选项卡单击切换到标准和自定义事件。谁能建议我如何实现相同的目标并可以向我展示这种场景的理想流程（模型名称和检查“is_standard”的一部分，在控制器中传播相同内容并渲染到视图）？

顺便说一句，我可以在同一模型上使用不同的控制器吗？如果我这样做，那么它是否能够为不同的事件及其属性执行相同的 CRUD 功能？

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1 回答 1

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我一个人完成了所有工作，起初我的想法并不难，所有技巧都是由JQuery完成的……如果有人遇到和我一样的问题，请分享这个概念

我的模型是

class AppsEvent < ActiveRecord::Base
  belongs_to :app
  has_many :apps_events_attributes, :foreign_key => 'apps_event_id',
       :class_name => 'AppsEventsAttribute',
       :dependent => :destroy
  accepts_nested_attributes_for :apps_events_attributes,
                            :reject_if => lambda { |a| (a[:name].blank? &&    a[:description].blank?) },
                            :allow_destroy => true
  validates_presence_of :description
  validates_presence_of :name
  validates_presence_of :code
  validates_presence_of :apps_events_attributes, :message => "can't be empty"
end

和

class AppsEventsAttribute < ActiveRecord::Base
  set_table_name :apps_events_attributes
  belongs_to :apps_event, :foreign_key => 'apps_event_id'
  attr_accessible :id, :apps_event_id, :name, :description, :attribute_type, :is_std, :created_at, :updated_at

  def type
    self.attribute_type
  end
end

我的控制器是...

class AppsEventsController < ApplicationController
  layout :layout_by_resource
  before_filter :initialize_default_app
  before_filter :check_permission
  before_filter :load

  def load
    @app = current_user.find_app(params[:app_id])
    @apps_events = AppsEvent.where(:app_id => @app.id)
    @apps_event = AppsEvent.new
  end

  def index
    @app = current_user.find_app(params[:app_id])
    @default_app = App.default(current_user)
    @apps_events = AppsEvent.where(:app_id => @app.id)
    @apps_event_jsons = Hash.new
    @apps_events.each do |app_event|
      json = Hash.new
      json['User_ID'] = 548741213
      json['Session_ID'] = 2568639390
      json['Action_Type'] = app_event.code
      json['eventsData'] = {}

      app_event.apps_events_attributes.each do |apps_event_attributes|
        if (apps_event_attributes.attribute_type == 'Integer')
          json['eventsData'][apps_event_attributes.name] = 1234
        elsif (apps_event_attributes.attribute_type == 'Float')
          json['eventsData'][apps_event_attributes.name] = 1234.23
        else
          json['eventsData'][apps_event_attributes.name] = 'abcd'
        end
      end

      @apps_event_jsons[app_event.id] = json
    end
  end

  def new
    @apps_event = AppsEvent.new
    @app = current_user.find_app(params[:app_id])
    @apps_event.app_id = @app.id
    @apps_event.apps_events_attributes.build
    @action = 'create'
    render 'edit'
  end

  def edit
    @app = current_user.find_app(params[:app_id])
    @apps_event = AppsEvent.find(params[:id])
    @action = 'update'
  end

  def create
    @apps_event = AppsEvent.new(params[:apps_event])
    @show_custom_event = 'true'
    @apps_event.name = @apps_event.name.strip
    respond_to do |format|
      if @apps_event.save
        format.html {
          redirect_to("/app/#{params[:apps_event][:app_id]}/apps_events",
                  :notice => "Successfully created #{@apps_event.name} custom definition.")
        }
        format.js {
          flash[:notice] = 'Successfully created event.'
          @apps_events = AppsEvent.where(:app_id => @app.id)
        }
      else
        @app = current_user.find_app(params[:app_id])

        if (@apps_event.apps_events_attributes == nil ||   @apps_event.apps_events_attributes.size <= 0)
          @apps_event.apps_events_attributes.build
        end

        @apps_event.populate_code
        @action = 'create'
        format.html {
          redirect_to("/app/#{params[:apps_event][:app_id]}/apps_events",
                  :alert => "Error in creating #{@apps_event.name} custom definition.")
        }
        format.js
      end
    end
  end

  def update
    @apps_event = AppsEvent.find(params[:apps_event][:id])
    params[:apps_event][:name] = params[:apps_event][:name].strip

    respond_to do |format|
      if @apps_event.update_attributes(params[:apps_event])
        format.html {
          if(@apps_event.is_std == 'y')
            redirect_to("/app/#{params[:apps_event][:app_id]}/apps_events",
                  :notice => "Successfully updated #{@apps_event.name} standard definition.")
          else
            redirect_to("/app/#{params[:apps_event][:app_id]}/apps_events",
                    :notice => "Successfully updated #{@apps_event.name} custom definition.")
          end
        }
        format.js {
          flash[:notice] = 'Successfully updated event.'
          @apps_events = AppsEvent.where(:app_id => @app.id)
          render :nothing => true
        }
      else
        @app = current_user.find_app(params[:app_id])

        if (@apps_event.apps_events_attributes == nil || @apps_event.apps_events_attributes.size <= 0)
          @apps_event.apps_events_attributes.build
        end

        @apps_event.populate_code
        @action = "update"
        format.html {
          if(@apps_event.is_std == 'y')
            redirect_to("/app/#{params[:apps_event][:app_id]}/apps_events",
                  :alert => "Error in updating #{@apps_event.name} standard definition.")
          else
            redirect_to("/app/#{params[:apps_event][:app_id]}/apps_events",
                    :alert => "Error in updating #{@apps_event.name} custom definition.")
          end
        }
        format.js
      end
    end
  end

  def delete
    if AppsEvent.delete(params[:id])
      redirect_to "/app/#{params[:app_id]}/apps_events", :notice => "Successfully deleted #{@apps_event.name} custom definition."
    else
      redirect_to "/app/#{params[:app_id]}/apps_events",
              :alert => "Error in deleting #{@apps_event.name} custom definition."
    end
  end
end

我有 5 个视图文件，它们是 index.html.erb、edit.js.erb、_form_custom.html.erb、_form_standard.html.erb 和 _events.html.erb，旁边还有一个用于更新、创建和删除的帮助文件通过设置 remote => true 使用 ajax 调用。在索引文件中，我正在部分渲染所有事件（_events.html.erb），在这里我完成了技巧：P
我的_events.html.erb

<% for apps_event in @apps_events %>
  <% if (apps_event.is_std == 'y') %>
    <div class="standardEvent showStandard">
      <ul>
        <li class="column_1"><span style="font-weight: bold;"><%= apps_event.name %></span></li>
        <li class="column_2"><span><%= apps_event.code %></span></li>
        <li class="column_3"><span><%= apps_event.description %></span></li>
        <li class="column_4">
          <%= link_to edit_apps_event(apps_event) %>
        </li>
        <li class="column_5">

        </li>
      </ul>
    </div>
  <% else %>
    <div class="customEvent showCustom" style="display:none">
      <ul>
        <li class="column_1"><span style="font-weight: bold;"><%= apps_event.name %></span></li>
        <li class="column_2"><span><%= apps_event.code %></span></li>
        <li class="column_3"><span><%= apps_event.description %></span></li>
        <li class="column_4">
          <%= link_to edit_apps_event(apps_event) %>
        </li>
        <li class="column_5">
          <%= remove_apps_event_prompt_link(apps_event) %>
        </li>
      </ul>
    </div>
  <% end %>
  <div class="clrBoth"></div>
<% end %>

现在你可以弄清楚左边部分的意思——JQuery 部分隐藏或显示一个 div。

于 2013-07-09T11:59:18.230 回答