我正在使用产品模型运行一个仅使用Rails Api-Apply应用程序。我已经使用ActiveAdmin在后端创建了产品。当使用Postman查看具有相应产品ID的单个产品时，它会返回JSON数据罚款，但是当我尝试查看所有产品时：

Question

启动“/api/v1/products/” for :: 1 at 2019-05-28 11:12:47 +0100 由API :: V1 :: ProductsController＃index作为JSON处理 参数：{“ product” => {}} 过滤链停止为：set_product渲染或重定向 在5ms中找不到404个（视图：0.2ms | ActivereCord：4.9ms）

这里是我的控制器：

module Api
  module V1
    class ProductsController < Api::V1::ApiController
      # do not authenticate users before viewing product listing or individual products
      before_action :authenticate_user!, except: %i[index show]
      before_action :set_product, only: %i[index show]

      # GET /product
      def index
        product = Product.all.order('id')
        render json: { success: true, data: product }, status: :ok
      end

      # GET /products/:id
      def show
        @product = Product.find(params[:id])
        render json: { success: true, data: @products }, status: :ok
      end

      private

      def set_product
        @products = Product.find(params[:id])
        rescue StandardError => error
        render json: { success: false, error: error }, status: 404
      end

      def product_params
        params.require(:product).permit(:title, :release_date, :release_time, :description, :price, :brand)
      end

    end
  end
end

我的API观点是：

__PRODUCT.JSON.JBUILDER

json.id               product.id
json.title            product.title
json.description      product.description
json.release_date     product.release_date
json.release_time     product.release_time
json.price            product.price
json.brand            product.brand

Index.json.jbuilder

json.array! @products, partial: 'products/product', as: :product

show.json.jbuilder

json.product do
  json.partial! 'product' 
end

routes

namespace :api do
    namespace :v1, defaults: { format: :json } do
      devise_scope :user do
        get :status, to: 'api#status'
        resource :user, only: %i[update show] do
          get :profile
        end
      end
      resources :products, only: [:index, :show]
    end
    
  end

Convert

module Api
  module V1
    class ProductsController < Api::V1::ApiController
      # do not authenticate users before viewing product listing or individual products
      before_action :authenticate_user!, except: %i[index show]
      before_action :set_product, only: %i[index show]

      # GET /product
      def index
        product = Product.all.order('id')
        render json: { success: true, data: product }, status: :ok
      end

      # GET /products/:id
      def show
        @product = Product.find(params[:id])
        render json: { success: true, data: @products }, status: :ok
      end

      private

      def set_product
        @products = Product.find(params[:id])
        rescue StandardError => error
        render json: { success: false, error: error }, status: 404
      end

      def product_params
        params.require(:product).permit(:title, :release_date, :release_time, :description, :price, :brand)
      end

    end
  end
end

to

module Api
  module V1
    class ProductsController < Api::V1::ApiController
      # do not authenticate users before viewing product listing or individual products
      before_action :authenticate_user!, except: %i[index show]
      before_action :set_product, only: %i[show]

      # GET /product
      def index
        @products = Product.all.order('id')
        render json: { success: true, data: @products }, status: :ok
      end

      # GET /products/:id
      def show
        if @product.present?
          render json: { success: true, data: @product }, status: :ok
        else
           render json: { success: false }, status: :not_found
        end

      end

      private

      def set_product
        @product = Product.find(params[:id])
      end

      def product_params
        params.require(:product).permit(:title, :release_date, :release_time, :description, :price, :brand)
      end

    end
  end
end

Answer 1