ruby-on-rails - 如何在rails中设置一个like按钮

Question

您好，我有一个锻炼应用程序，用户应该可以在其中为某些产品点赞。我可以找到一种方法来展示他喜欢的产品，但我真的不知道如何创建和制作喜欢按钮。我没有使用任何 gem，我不想了解如何从头开始。

这是我的模型:

class User < ApplicationRecord
  has_many :likes
  has_many :liked_products, through: :likes, source: :product
end

class Product < ApplicationRecord
  has_many :likes
end

class Like < ApplicationRecord
  belongs_to :user
  belongs_to :product
end

在我的 View 产品展示中，我想要点赞按钮的位置:

<h1><%= @product.name %></h1>

<%= link_to "Like", product_likes_path(@product), method: :put, remote: true %>

我的路线:

Rails.application.routes.draw do
  root to: 'visitors#index'
  devise_for :users
  resources :users

  resources :products do
    resource :likes
  end
end

那是我的产品 Controller ，我认为东西必须进入这里，但我不知道如何进入!

class ProductsController < ApplicationController

  before_action :find_product, only: :show

  def index
    @products = Product.all
  end

  def show
    #@product.like  => gives an error 404
  end

  private

  def find_product
    @product = Product.find(params[:id])
  end
end

我已经创建了一个点赞 Controller ，但它似乎没有用......所以......我放弃了......

class LikesController < ApplicationController

  def new
    @like = Like.new(like_params)
  end

  def create
    @like = Like.new(like_params)
  end

  private

  def like_params
    params.require(:likes).permit(:user_id, :product_id)
  end

end

我真的很喜欢这个问题:)

Answer 1

终于知道怎么设置 Controller 了

class LikesController < ApplicationController

  def create
    @user = current_user.id
    @product = params[:product_id]
    likes = {user_id: @user, product_id: @product}
    @like = Like.new(likes)

    @like.save!
    if @like.save
      redirect_to user_path(@user)
    else
     redirect_to product_path
    end
  end


end

按钮

<%= link_to "Like", product_likes_path(@product), method: :post %>

路线

Rails.application.routes.draw do
    root to: 'products#index'
    devise_for :users

    resources :users

    resources :users do
      resources :products do
        resources :likes
      end
    end
  end