Ruby 关于 rails 查询不知道怎么写

Ruby on rails query don't know how to write it

我是 ruby rails 的新手,但不是编程人员。我有一个问题要查询。我也知道 restaurants 拼错了

 class ResturantsController < ApplicationController
   before_action :set_resturant, only: %i[ show edit update destroy ]

   # GET /resturants or /resturants.json
   def index
    @resturants = Resturant.all.order("created_at desc")
   end

   # GET /resturants/1 or /resturants/1.json
   def show
     @food_items = FoodItem.find(resturant = Resturant.name)
   end
  1. 为什么我可以获得特定的 GET 以按名称获取餐厅所以 /resturants/McDonalds 例如

  2. 我还想将@food_items = FoodItem.find(resturant = Resturant.name) 写成 SELECT * 来自 food_Items WHERE(餐厅:restaurant.name)

通过名称获取餐厅 @resturants = Resturant.find_by_name("restuarant_name")

获取食品 @food_items = FoodItem.where(resturant: "restuarant_name")