Rails没有触及＆＃34;关注＆＃34;？

Question

在我的购物车控制器中，我有：

class CartsController < ApplicationController
  before_action :set_cart, only: [:show, :edit, :update, :destroy]
  rescue_from ActiveRecord::RecordNotFound, with: :invalid_cart

并在controllers / concerns / current_cart.rb中我有：

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

但是当我点击“添加到购物车”时，我收到错误消息

"undefined method `set_cart' for #<CartsController"

有什么见解？感谢。

Answer 1

您需要包含模块：

class CartsController < ApplicationController
  include CurrentCart
  before_action :set_cart, only: [:show, :edit, :update, :destroy]
  rescue_from ActiveRecord::RecordNotFound, with: :invalid_cart