Rails: неопределенный метод `has_liked? '

Question

Я получаю NoMethodError, что я не могу понять, это говорит undefined method 'has_liked?'. У меня есть «идеи» crud, у которых есть «комментарии», и я пытаюсь добавить способность любить/не любить комментарии.

NoMethodError in Comments#new на этой линии здесь <% if user_signed_in? && current_user.has_liked?(comment) %>

Вот мой comments_controller.rb

class CommentsController < ApplicationController 

    def new 
    @ideas = Idea.find(params[:idea_id]) 
    @comment = Comment.new 
    end 

    def create 
    @ideas = Idea.find(params[:idea_id]) 
    @comment = @ideas.comments.build(comment_params) 
    # @comment.user = current_user 
    if @comment.save 
     redirect_to new_idea_comment_path (@ideas) 
    end 
    end 

    private 
    def comment_params 
    params.require(:comment).permit(:id, :body) 
    end 

end 

(комментарии) _form.html.erb

<%= form_for [@ideas, @comment] do |f| %> 

    <div class="container"> 
    <div class="form-group"> 
     <%= f.label :body %> 
     <%= f.text_area :body, class: "form-control" %> 
    </div> 

    <div class="form-group"> 
     <%= f.submit "Submit comment", class: "btn btn-primary" %> 
     <%= link_to "Go back?", root_path %> 

    </div> 
    </div> 
<% end %> 

(комментарии) edit.html.erb

<%= render "form" %> 

(комментарии) new.html.erb

<%= render "form" %> 

<% for comment in @ideas.comments %> 
    <div class="container"> 
     <%= comment.body %> 

     <% if user_signed_in? && current_user.has_liked?(comment) %> 
     <% like = current_user.likes.find_by_comment_id(comment.id) %> 
     <%= link_to "unlike", comment_likes_path(comment, like), class: "btn btn-danger like ", method: :delete %> 
     <% else %> 
     <%= link_to "like", comment_like_path(comment), class: "btn btn-info like ", method: :post %> 
     <% end %> 
    <br> 
    <br> 
    </div> 
<%end%> 

likes_controller.rb

class LikesController < ApplicationController 

    def create 
    comment = Comment.find params[:comment_id] 
    like  = comment.likes.new 
    like.user = current_user 
    if like.save 
     redirect_to new_idea_comment_path(comment.idea), notice: "Liked!" 
    else 
     redirect_to new_idea_comment_path(comment.idea), alert: "Already liked!" 
    end 
    end 

    def destroy 
    comment = Comment.find params[:comment_id] 
    like = comment.likes.find params[:id] 
    if like.destroy 
     redirect_to new_idea_comment_path(comment.idea), notice: "Unliked!" 
    else 
     redirect_to new_idea_comment_path(comment.idea), alert: "Can't unlike!" 
    end 
    end 

end 

comment.rb

class Comment < ActiveRecord::Base 
    belongs_to :idea 
    belongs_to :user 
    has_many :likes, dependent: :nullify 
    has_many :users, through: :likes 
end 

like.rb

class Like < ActiveRecord::Base 
    belongs_to :user 
    belongs_to :comment 
end 

user.rb

class User < ActiveRecord::Base 
    # Include default devise modules. Others available are: 
    # :confirmable, :lockable, :timeoutable and :omniauthable 
    devise :database_authenticatable, :registerable, 
     :recoverable, :rememberable, :trackable, :validatable 
end 

маршруты:

Rails.application.routes.draw do 

    devise_for :users 
    root "ideas#index" 

    resources :ideas do 
    resources :comments 
    end 

    resources :comments, only: [] do 
    resources :likes 
    end 

Answer 1

Вы должны осуществить что-то вроде этого, чтобы использовать .has_liked? на пользователей:

class User < ActiveRecord::Base 
    has_many :likes 

    def has_liked?(comment) 
    likes.where(comment_id: comment.id).present? 
    end 

    ... 
end