Question

我需要帮助在我的网络应用中实施和添加收藏夹功能。这是一个食谱应用程序，厨师（用户）可以将其他厨师的食谱保存为“收藏夹”。

在模型级别，我有以下关联：

chef.rb：

has_many :favorites
has_many :recipes, through: :favorites

recipe.rb：

has_many :favorites
has_many :chefs, through: :favorites

favorite.rb：

class Favorite < ApplicationRecord
  belongs_to :chef
  belongs_to :recipe
end

在迁移文件中，我创建了一个收藏夹表：

t.integer :chef
t.integer :recipe
t.timestamps

在routes.rb中：

get 'my_favorites', to: 'chefs#my_favorites'
resources :favorites
post 'add_recipe', to: 'recipes#add_recipe'

在RecipesController中我定义了：

def my_favorites
 @favorites = current_chef.recipes
end

def add_recipe
 @recipe = Recipe.find(params[:id]) 
 current_chef.favorites.build(recipe_id: @recipe.id)

 if @recipe.save
  redirect_to my_favorites_path, notice: "Favorite recipe was 
                                       successfully added"
 else
  redirect_to my_favorites_path, flash[:error] = "There was an error 
                                 with adding recipe as favorite"
 end
end

观点：

我在views / recipes / show.html.erb文件中创建了一个“添加为我最喜欢的”link_to按钮。但是当我从浏览器中单击它时，它会返回错误：Couldn't find Recipe without an ID。

<% if logged_in? %>
 <% if current_chef.not_favorites_with?(@recipe) %>
  <%= link_to "Add as my favorite", add_recipe_path(chef: 
                              current_chef, recipe: @chef), 
                              class: "btn btn-xs btn-success", 
                              method: :post %>
 <% else %>
  <span class="label label-primary">
  It's already your favorite recipe
  </span>
 <% end %>
<% end %>

这就是服务器中发生的事情：

Processing by RecipesController#add_recipe as HTML
 Parameters:    {"authenticity_token"=>"Pz5C/yK0mP5QtONHJs83fhxcrQ6Alvbp2qpPrVOiKdBKyIUys
pww/7L8S66lcOmFGWZr8Lq1ka1rt2D4FbY8NQ==", "chef"=>"9"}
 Chef Load (0.3ms)  SELECT  "chefs".* FROM "chefs" WHERE "chefs"."id" 
= ? ORDER BY "chefs"."created_at" DESC LIMIT ?  [["id", 9], ["LIMIT", 1]]
 Completed 404 Not Found in 3ms (ActiveRecord: 0.3ms)  

ActiveRecord::RecordNotFound (Couldn't find Recipe without an ID):

我不知道为什么它不能抓住食谱的id。

https://github.com/0rdinaryman/myrecipes

Answer 1

在控制器中，您尝试按id搜索配方，但在链接中传递为recipe。尝试将链接修改为

<%= link_to "Add as my favorite", add_recipe_path(chef: 
                              current_chef, id: @recipe), 
                              class: "btn btn-xs btn-success", 
                              method: :post %>

添加到收藏夹（rails 5）返回错误（无法找到没有ID的配方）

1 个答案: