如何在rails 5中創建API？

Question

我是新來的Web服務和Rails了。我有使用rails 5創建API的疑問。如何爲rails 5應用程序創建API？我可以在API中找到一些教程使用rails 5的應用程序。但是我需要在單個rails 5應用程序中使用API​​和視圖。我應該怎麼做？

Answer 1

您可以創建一個新的Rails項目和往常一樣：

$ rails new my_project 
$ cd my_project 
$ bundle 

然後你就可以使用scaffold生成一些代碼：

$ rails g scaffold Product name:string price:float 

並遷移數據庫：

$ rails db:migrate # => update the database 

你現在可以看看app/controllers/products_controller.rb

class ProductsController < ApplicationController 
    before_action :set_product, only: [:show, :edit, :update, :destroy] 

    # GET /products 
    # GET /products.json 
    def index 
    @products = Product.all 
    end 

    # GET /products/1 
    # GET /products/1.json 
    def show 
    end 

    # GET /products/new 
    def new 
    @product = Product.new 
    end 

    # GET /products/1/edit 
    def edit 
    end 

    # POST /products 
    # POST /products.json 
    def create 
    @product = Product.new(product_params) 

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

    # PATCH/PUT /products/1 
    # PATCH/PUT /products/1.json 
    def update 
    respond_to do |format| 
     if @product.update(product_params) 
     format.html { redirect_to @product, notice: 'Product was successfully updated.' } 
     format.json { render :show, status: :ok, location: @product } 
     else 
     format.html { render :edit } 
     format.json { render json: @product.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # DELETE /products/1 
    # DELETE /products/1.json 
    def destroy 
    @product.destroy 
    respond_to do |format| 
     format.html { redirect_to products_url, notice: 'Product was successfully destroyed.' } 
     format.json { head :no_content } 
    end 
    end 

    private 
    # Use callbacks to share common setup or constraints between actions. 
    def set_product 
     @product = Product.find(params[:id]) 
    end 

    # Never trust parameters from the scary internet, only allow the white list through. 
    def product_params 
     params.require(:product).permit(:name, :price) 
    end 
end 

正如你所看到的的create行動。這是您可以如何響應不同的請求類型。

瞭解更多關於它：http://edgeapi.rubyonrails.org/classes/ActionController/MimeResponds.html#method-i-respond_to