ruby-on-rails – 在Rails API中使用render而不是respond_with /

控制器：

class Api::V1::SuyasController < ApplicationController
  def index
    render json: Suya.all
  end

  def create
    render json: Suya.create(suyas_params)
  end


  private

  def suyas_params
    params.require(:suya).permit(:meat,:spicy)
  end
end

路线：

Rails.application.routes.draw do
  namespace :api do
    namespace :v1 do
      resources :vendors
      resources :suyas
    end
  end
end

测试：

require 'test_helper'

class Api::V1::SuyasControllerTest < ActionController::TestCase
  test "index can get all the suyas" do
    Suya.create(meat: "beef",spicy: true)
    Suya.create(meat: "kidney",spicy: false)

    get :index
    suyas = JSON.parse(response.body)

    assert_equal "beef",suyas[0]["meat"]
    assert_equal true,suyas[0]["spicy"]
    assert_equal "kidney",suyas[1]["meat"]
    assert_equal false,suyas[1]["spicy"]
  end

  test "create can create a suya" do
    assert_difference("Suya.count",1) do
      create_params = { suya: { meat: "beefy",spicy: true },format: :json }

      post :create,create_params
      suya = JSON.parse(response.body)

      assert_equal "beefy",suya["meat"]
      assert_equal true,suya["spicy"]
    end
  end
end

使用render和respond_with有什么区别？我找不到任何答案.甚至有什么我做错了吗？为什么有两种方法来创建API(respond_to / respond_with AND这种方式？)

-Jeff