Rails 数据库常见错误处理

1.NOTFOUND

class CartsController < ApplicationController
    before_action :set_cart, only: [:show, :edit, :update, :destroy]
    rescue_from ActiveRecord::RecordNotFound, with: :invalid_cart
    def invalid_cart
        logger.error "Attempt to access invalid cart #{params[:id]}"
        redirect_to store_url, notice: 'Invalid cart'
    end
end