我正在尝试构建分配给用户的购物车。现在发生的事情是,当一个项目被添加到购物车时,它会为每个用户添加。似乎每个用户都使用相同的购物车,我无法让用户能够添加到其他用户的购物车。我怎样才能让每个用户拥有一个独特的购物车,只能添加到他们的购物车中?
这就是我所拥有的:
class CartsController < ApplicationController
before_action :set_cart, only: [:show, :edit, :update, :destroy]
before_action :logged_in_user, only: [:create, :edit, :update, :destroy, :show]
rescue_from ActiveRecord::RecordNotFound, with: :invalid_cart
# GET /carts
# GET /carts.json
def index
@carts = Cart.all
end
# GET /carts/1
# GET /carts/1.json
def show
end
# GET /carts/new
def new
@cart = Cart.new
end
# GET /carts/1/edit
def edit
end
# POST /carts
# POST /carts.json
def create
@cart = Cart.new(cart_params)
respond_to do |format|
if @cart.save
format.html { redirect_to @cart, notice: 'Cart was successfully created.' }
format.json { render action: 'show', status: :created, location: @cart }
else
format.html { render action: 'new' }
format.json { render json: @cart.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /carts/1
# PATCH/PUT /carts/1.json
def update
respond_to do |format|
if @cart.update(cart_params)
format.html { redirect_to @cart, notice: 'Cart was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @cart.errors, status: :unprocessable_entity }
end
end
end
# DELETE /carts/1
# DELETE /carts/1.json
def destroy
@cart.destroy if @cart.id == session[:cart_id]
session[:cart_id] = nil
respond_to do |format|
format.html { redirect_to store_url, notice: "Your cart is currently empty" }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_cart
@cart = Cart.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def cart_params
params[:cart]
end
def invalid_cart
logger.error "Attempt to access invalid cart #{params[:id]}"
redirect_to store_url, notice: "Invalid Cart"
end
end
current_cart.rb
module CurrentCart
extend ActiveSupport::Concern
private
def set_cart
@cart = Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
@cart = Cart.create
session[:cart_id] = @cart.id
end
end
line_item_controller.rb
class LineItemsController < ApplicationController
include CurrentCart
before_action :set_cart, only: [:new, :create]
before_action :set_line_item, only: [:show, :edit, :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
# GET /line_items/new
def new
@line_item = LineItem.new
end
# GET /line_items/1/edit
def edit
end
# POST /line_items
# POST /line_items.json
def create
product = Product.find(params[:product_id])
@line_item = @cart.add_product(product: product)
respond_to do |format|
if @line_item.save
format.html { redirect_to @line_item.cart, notice: 'Line item was successfully created.' }
format.json { render action: 'show', status: :created, location: @line_item }
else
format.html { render action: 'new' }
format.json { render json: @line_item.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /line_items/1
# PATCH/PUT /line_items/1.json
def update
respond_to do |format|
if @line_item.update(line_item_params)
format.html { redirect_to @line_item.cart, notice: 'Line item was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @line_item.errors, status: :unprocessable_entity }
end
end
end
# DELETE /line_items/1
# DELETE /line_items/1.json
def destroy
@line_item.destroy
respond_to do |format|
format.html { redirect_to line_items_url }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_line_item
@line_item = LineItem.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def line_item_params
params.require(:line_item).permit(:product_id )
end
end
答案 0 :(得分:0)
而不是 CurrentCart.rb 中的Cart.create
和Cart.find
,您应该执行以下操作:
def set_cart
@cart = current_user.carts.find_by(id: session[:cart_id]) || current_user.carts.create
session[:cart_id] = @cart.id
end
find_by
如果找不到则不会抛出错误;它只返回零,所以你不必担心拯救。