我对 ruby on Rails 很陌生,我想将会话添加回 Rails 6 API 应用程序,以便我在会话中获得
current_cart
id,如果会话中不存在该 id,它将继续创建一个新的购物车并将 ID 存储在会话中。
以下是我的申请.rb
# frozen_string_literal: true
require_relative 'boot'
require 'rails'
# Pick the frameworks you want:
require 'active_model/railtie'
require 'active_job/railtie'
require 'active_record/railtie'
require 'active_storage/engine'
require 'action_controller/railtie'
require 'action_mailer/railtie'
require 'action_mailbox/engine'
require 'action_text/engine'
require 'action_view/railtie'
require 'action_cable/engine'
require 'sprockets/railtie'
# require "rails/test_unit/railtie"
# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(*Rails.groups)
module DepotApi
class Application < Rails::Application
# Initialize configuration defaults for originally generated Rails version.
config.load_defaults 6.1
# skip verifying users on logout
config.to_prepare do
Devise::SessionsController.skip_before_action :verify_signed_out_user, only: :destroy
end
# Configuration for the application, engines, and railties goes here.
#
# These settings can be overridden in specific environments using the files
# in config/environments, which are processed later.
#
# config.time_zone = "Central Time (US & Canada)"
config.eager_load_paths << Rails.root.join('lib')
# Only loads a smaller set of middleware suitable for API only apps.
# Middleware like session, flash, cookies can be added back manually.
# Skip views, helpers and assets when generating a new resource.
config.api_only = true
config.app_generators.scaffold_controller = :scaffold_controller
# Middleware for ActiveAdmin
config.middleware.use Rack::MethodOverride
config.middleware.use ActionDispatch::Flash
config.middleware.use ActionDispatch::Cookies
config.middleware.use ActionDispatch::Session::CookieStore
end
end
下面是我的 Line_items 控制器
# frozen_string_literal: true
class LineItemsController < ApiController
include CurrentCart
before_action :set_cart, only: [:create]
before_action :set_line_item, only: %i[show update destroy]
# GET /line_items
# GET /line_items.json
def index
@line_items = LineItem.all
end
# GET /line_items/1
# GET /line_items/1.json
def show; end
# POST /line_items
# POST /line_items.json
def create
product = Product.find(params[:product_id])
@line_item = @cart.add_product(product)
if @line_item.save
render :show, status: :created, location: @line_item
else
render json: @line_item.errors, status: :unprocessable_entity
end
end
# Increasing quantity
def add_quantity
@line_item.quantity += 1
@line_item.save
end
# decreasing quantity
def reduce_quantity
@line_item.quantity > 1
@line_item.quantity -= 1
@line_item.save
end
# PATCH/PUT /line_items/1
# PATCH/PUT /line_items/1.json
def update
if @line_item.update(line_item_params)
render :show, status: :ok, location: @line_item
else
render json: @line_item.errors, status: :unprocessable_entity
end
end
# DELETE /line_items/1
# DELETE /line_items/1.json
def destroy
@line_item.destroy
end
private
# Use callbacks to share common setup or constraints between actions.
def set_line_item
@line_item = LineItem.find(params[:id])
end
# Only allow a list of trusted parameters through.
def line_item_params
params.require(:line_item).permit(:product_id)
end
end
@cart
的值由我当前包含的模块设置。下面是我设置会话的
Currentcart
模块
module CurrentCart
private
def set_cart
@cart = Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
@cart = Cart.create
session[:cart_id] = @cart.id
end
end
我所有的 API 控制器都从此扩展而来
apiController
除了 activeadmin
class ApiController < ActionController::API
end
下面是我的应用程序控制器
# frozen_string_literal: true
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by using :null_session
protect_from_forgery with: :null_session
before_action :configure_permitted_parameters, if: :devise_controller?
rescue_from CanCan::AccessDenied do |_exception|
render json: { error: 'Access denied' }, status: :forbidden
end
def authenticate_admin_user!
if admin_user_signed_in?
admin_root_path
else
new_admin_user_session_path
end
end
protected
def configure_permitted_parameters
devise_parameter_sanitizer.permit(:sign_up, keys: %i[user_name email role])
devise_parameter_sanitizer.permit(:sign_in, keys: %i[user_name email role])
end
end
config.api_only = true
config.app_generators.scaffold_controller = :scaffold_controller
# Middleware for ActiveAdmin
config.middleware.use Rack::MethodOverride
config.middleware.use ActionDispatch::Flash
config.middleware.use ActionDispatch::Cookies
config.middleware.use ActionDispatch::Session::CookieStore
然后在创建反应应用程序中我添加了这个设置
package.json
"proxy": "http://127.0.0.1:4000"
然后我在前端的所有路线(创建反应应用程序)都更改如下
http://127.0.0.1.400/products
至 /products
您可以从前端的会话中获取任何内容