我的应用有用户和购物车。
Theres目前没有用户和购物车之间的链接。
目前,无论用户是否登录,只有一个购物车可用,当添加产品时会创建current_cart,并在购物车付款时创建order_transaction(成功或失败)。如果成功,下次将产品添加到购物车时将创建新购物车。
如何将购物车与用户相关联,以便每位用户在添加产品时都为他们创建了新购物车?
application_controller
def current_user
@current_user ||= User.find(session[:user_id]) if session[:user_id]
end
def current_cart
if session[:cart_id]
@current_cart ||= Cart.find(session[:cart_id])
session[:cart_id] = nil if @current_cart.purchased_at
end
if session[:cart_id].nil?
@current_cart = Cart.create!
session[:cart_id] = @current_cart.id
end
@current_cart
end
路线
get "log_in" => "sessions#new", :as => "log_in"
get "log_out" => "sessions#destroy", :as => "log_out"
get "sign_up" => "users#new", :as => "sign_up"
get "cart" => "carts#show", :as => "current_cart"
resources :orders
resources :line_items
resources :carts
resources :products
resources :order_transactions
resources :sessions
resources :users
line_items_controller
class LineItemsController < ApplicationController
def create
@product = Product.find(params[:product_id])
@line_item = LineItem.create!(:cart => current_cart, :product => @product, :quantity => 1, :unit_price => @product.price)
flash[:notice] = "Added #{@product.name} to cart."
redirect_to current_cart_url
end
end
感谢任何帮助,非常感谢!
答案 0 :(得分:0)
最简单的方法是让用户拥有购物车
class User < ActiveRecord::Base
has_one :cart
def current_cart
if self.cart.empty?
self.cart.create!
end
self.cart
end
end
class Cart < ActiveRecord::Base
belongs_to :user
def add_line_item(item)
etc...
end
end
class ApplicationController < ActionController::Base
def current_user
@current_user ||= User.find(session[:user_id]) if session[:user_id]
end
def current_cart
current_user.current_cart if current_user.present?
end
end
我会推荐这个。这样,你只有 ONE 的东西来跟踪会话。您还应该尽量将“业务逻辑”DOWN移动到模型层,以便更容易测试。