问Rails 3与Ajax交互

EN

class PlantsController < ApplicationController
  # GET /plants
  # GET /plants.json
  def index
    @plants = Plant.all

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

  # GET /plants/1
  # GET /plants/1.json
  def show
    @plant = Plant.find(params[:id])

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

  # GET /plants/new
  # GET /plants/new.json
  def new
    @plant = Plant.new

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

  # GET /plants/1/edit
  def edit
    @plant = Plant.find(params[:id])
  end

  # POST /plants
  # POST /plants.json
  def create
    @plant = Plant.new(params[:plant])

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

  # PUT /plants/1
  # PUT /plants/1.json
  def update
    @plant = Plant.find(params[:id])

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

  # DELETE /plants/1
  # DELETE /plants/1.json
  def destroy
    # binding.pry
    @plant = Plant.find(params[:id])
    @plant.destroy

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

<h1>Listing plants</h1>

<table class="show">
  <tr>
    <th>Name</th>
    <th>Comment</th>
    <th></th>
    <th></th>
    <th></th>
  </tr>

<%= render "plants/plant" %>

</table>

<br />

<%= link_to 'New Plant', new_plant_path %>

<% @plants.each do |plant| %>
  <tr>
    <td><%= plant.name %></td>
    <td><%= plant.comment %></td>
    <td><%= link_to 'Show', plant %></td>
    <td><%= link_to 'Edit', edit_plant_path(plant) %></td>
    <td><%= link_to 'Destroy', plant, confirm: 'Are you sure?', :method => :delete, :remote => true %></td>
  </tr>
<% end %>

$('.show').html("<%= render @plant %>");