在 rails 中实施 "Add to collection" 4

Question

我正在开发一款应用程序，用户可以在其中找到厨师制作的食谱。我已经实现了 "like/dislike" 功能，但现在我想让用户能够将食谱保存在 collection 中。用户可以创建许多 collections，因此当他想在 collection 中保存食谱时，他应该能够看到他当前的 collections 或创建一个新的。

这是我的模型：

class User < ActiveRecord::Base
 has_many :collections
 accepts_nested_attributes_for :collections
end

class Collection < ActiveRecord::Base
 has_many :recipe_collections
 has_many :recipes, through: :recipe_collections
end

class Recipe < ActiveRecord::Base
 has_many :recipe_collections
end

class RecipeCollection < ActiveRecord::Base
 belongs_to :recipe
 belongs_to :collection
end

我的recipe_collections_controller.rb

class RecipeCollectionsController < ApplicationController
  before_action :set_recipe, only: [:create]
  before_action :set_user, only: [:create]


  def create
    @recipe_collection = @recipe.recipe_collections.build(recipe_collection_params)
    if current_user
      @recipe_collection.save
      respond_to do |format|
        format.html {redirect_to :back }
      end
    else
      respond_to do |format|
        format.html { render 'recipes/show' }
      end
    end
  end

  private

  def set_user
    @user = current_user
  end

  def set_recipe
    @recipe = Recipe.find(params[:recipe_id])
  end

  def recipe_collection_params
    params.require(:recipe_collection).permit(:collection_id, :recipe_id, collection_attributes: [:id], recipe_attributes: [:id])
  end

end

在食谱展示中，我有一个渲染图，show.html.erb:

<%= render "recipe_collections/form", collection: @recipe_collection || @recipe.recipe_collections.build%>

我的部分_form.html.erb

<%= simple_form_for ([ collection.recipe, collection ]) do |form| %>
  <%= form.association :collection, as: :check_boxes %>
  <%= form.button :submit %>
<% end %>

我的routes.rb

  resources :recipes, :concerns => :paginatable do
    member do
      get "like", to: "recipes#upvote"
      get "dislike", to: "recipes#downvote"
    end
    resources :reviews, only: :create
    resources :recipe_collections
  end

问题是什么：

1：在我的节目中，我有一个复选框表单，但它不显示当前用户 collection，而是显示所有用户。

2：当我提交表单时，它没有将食谱保存在我选择的collection中。

编辑：

这是我提交表单时的日志示例。

Started POST "/recipes/66/recipe_collections" for ::1 at 2015-04-06 23:58:06 +0200
Processing by RecipeCollectionsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"GhMIJs4nNmwsLpzBj4l5ta/OW6fN9dfuzBBnciJsjEa0YlfjQMQYDEmwhcXb9++oEmS36yEbgICNsSdbLgiigA==", "recipe_collection"=>{"collection_id"=>["24", ""]}, "commit"=>"Créer un(e) Recipe collection", "recipe_id"=>"66"}
   (0.4ms)  SELECT COUNT(*) FROM "recipes"
   (0.2ms)  SELECT COUNT(*) FROM "publishers"
   (0.2ms)  SELECT COUNT(*) FROM "votes"
  Recipe Load (0.2ms)  SELECT  "recipes".* FROM "recipes" WHERE "recipes"."id" =  LIMIT 1  [["id", 66]]
  User Load (0.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" =   ORDER BY "users"."id" ASC LIMIT 1  [["id", 5]]
Unpermitted parameter: collection_id
   (0.1ms)  BEGIN
  SQL (0.3ms)  INSERT INTO "recipe_collections" ("recipe_id", "created_at", "updated_at") VALUES (, , ) RETURNING "id"  [["recipe_id", 66], ["created_at", "2015-04-06 21:58:06.566948"], ["updated_at", "2015-04-06 21:58:06.566948"]]
   (0.4ms)  COMMIT
Redirected to http://localhost:3000/recipes/66
Completed 302 Found in 11ms (ActiveRecord: 2.0ms)

Answer 1

你把菜谱和collection的关系设置成many-to-many还是one-to-many有点迷惑。您的文字暗示 collection 有很多食谱，而一个食谱属于一个 collection。虽然您的代码通过使用连接 table 并说明食谱有很多 recipe-collections 意味着您正在建立 many-to-many 关系。

也就是说你有点糊涂了...

如果一个菜谱属于collection。去掉加入table。食谱 belongs_to :collection，而 Collection has_many :食谱。摆脱这两个模型中的其他关系。在 Recipe 的迁移 table 中，确保有一个 t.belongs_to :collection 来设置外键。

如果一个食谱拥有并属于许多 collection。 保留连接 table，但将其命名为 collections_recipes Rails只有两边都是复数，并且是按字母顺序排列的，才能找到。食谱有_and_belongs_to_many :collections, Collection has_and_belong_to_many :食谱。删除 has_many :recipe_collections 和 through: 位，不要替换任何一个，Rails 会为您完成此操作。检查您在迁移中加入 table 是否有 t.belongs_to :recipe 和 :collection

希望这对您有所帮助。

在 rails 中实施 "Add to collection" 4

Implement a "Add to collection" in rails 4

ruby

ruby-on-rails

associations

ruby-on-rails-4