如何从 Ruby on Rails 解析 json 数据或（json 代码）

我有一个 Ruby on Rails 源代码，现在我想解析数据并发送数据。在我的代码中，它将从用户获取名称并显示它，如何解析 ROR 中的数据。

这是我的controller.rb代码

def index
    @hotels = Hotel.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @hotels }
    end
  end

  # GET /hotels/1
  # GET /hotels/1.json
  def show
    @hotel = Hotel.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @hotel }
    end
  end

  # GET /hotels/new
  # GET /hotels/new.json
  def new
    @hotel = Hotel.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @hotel }
    end
  end

  # GET /hotels/1/edit
  def edit
    @hotel = Hotel.find(params[:id])
  end

  # POST /hotels
  # POST /hotels.json
  def create
    @hotel = Hotel.new(params[:hotel])

    respond_to do |format|
      if @hotel.save
        format.html { redirect_to @hotel, notice: 'Hotel was successfully created.' }
        format.json { render json: @hotel, status: :created, location: @hotel }
      else
        format.html { render action: "new" }
        format.json { render json: @hotel.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /hotels/1
  # PUT /hotels/1.json
  def update
    @hotel = Hotel.find(params[:id])

    respond_to do |format|
      if @hotel.update_attributes(params[:hotel])
        format.html { redirect_to @hotel, notice: 'Hotel was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @hotel.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /hotels/1
  # DELETE /hotels/1.json
  def destroy
    @hotel = Hotel.find(params[:id])
    @hotel.destroy

    respond_to do |format|
      format.html { redirect_to hotels_url }
      format.json { head :no_content }
    end
  end

如何使用Json解析ROR中的这些数据如何编写解析这些数据的 json 文件，如何做到这一点

    **Answer of my question**

这部分我们必须在控制器中完成 酒店控制器.erb

  respond_to :json, :xml
      def index
        @hotels = Hotel.all

        respond_to do |format|
          format.html # show.html.erb
          format.json { render json: @hotels.to_json(:only => [ :id, :name ]) }
        end
      end

查看/index.json.erb

[
  <% @hotels.each do |hotel| %>
    { 'id': <%= hotel.id %>, 'name': "<%= hotel.name %>" },
  <% end %>
]

路线.rb

get 'hotels' => 'hotels#index', :as => 'hotels'