2

This is just out of curiosity, here's a generated controller from running rails g scaffold Thing:

class ThingsController < ApplicationController
  # GET /things
  # GET /things.json
  def index
    @things = Thing.all

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

  # GET /things/1
  # GET /things/1.json
  def show
    @thing = Thing.find(params[:id])

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

  # GET /things/new
  # GET /things/new.json
  def new
    @thing = Thing.new

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

  # GET /things/1/edit
  def edit
    @thing = Thing.find(params[:id])
  end

  # POST /things
  # POST /things.json
  def create
    @thing = Thing.new(params[:thing])

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

  # PUT /things/1
  # PUT /things/1.json
  def update
    @thing = Thing.find(params[:id])

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

  # DELETE /things/1
  # DELETE /things/1.json
  def destroy
    @thing = Thing.find(params[:id])
    @thing.destroy

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

Rails includes a format block in every action except for edit... Why is this? Theoretically another app pinging the server for json would still want to show whatever is being edited, right? It's easy enough to just add in, but I am curious why they chose to do it this way.

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1 回答 1

1

如果您想知道您正在更新什么，您可以通过show操作来完成。

于 2012-11-17T03:47:45.070 回答