我如何获得评论ID

Question

I'm developing a simple blogger app and I'm trying to add comment functionality to it. I'm trying to add delete/edit functionality to the comment, but I don't know how to get id of the comment I'm trying to edit. Here is what html code looks like:

  <div class = "comment">
    <p class = "author">Comment by <%= comment.author_name %>
      <span class="creationTime"> <%= distance_of_time_in_words(comment.created_at, Time.now) %> ago</span>
    </p>
    <p class="text"><%= comment.body %></p>
    <div class = "Button">
      <%= link_to "Edit this comment", edit_article_comment_path(@comment.article_id, @comment.id) %>
    </div>
  </div>

Article controller show action:

def show
    @article = Article.find(params[:id])
    @comment = Comment.new
    @comment.article_id = @article.id
end

Routes:

    article_comments GET    /articles/:article_id/comments(.:format)          comments#index
                     POST   /articles/:article_id/comments(.:format)          comments#create
 new_article_comment GET    /articles/:article_id/comments/new(.:format)      comments#new
edit_article_comment GET    /articles/:article_id/comments/:id/edit(.:format) comments#edit
     article_comment GET    /articles/:article_id/comments/:id(.:format)      comments#show
                     PATCH  /articles/:article_id/comments/:id(.:format)      comments#update
                     PUT    /articles/:article_id/comments/:id(.:format)      comments#update
                     DELETE /articles/:article_id/comments/:id(.:format)      comments#destroy
            articles GET    /articles(.:format)                               articles#index
                     POST   /articles(.:format)                               articles#create
         new_article GET    /articles/new(.:format)                           articles#new
        edit_article GET    /articles/:id/edit(.:format)                      articles#edit
             article GET    /articles/:id(.:format)                           articles#show
                     PATCH  /articles/:id(.:format)                           articles#update
                     PUT    /articles/:id(.:format)                           articles#update
                     DELETE /articles/:id(.:format)                           articles#destroy
                root GET    /                                                 articles#index

Error I get:

No route matches {:action=>"edit", :article_id=>"1", :controller=>"comments", :id=>nil} missing required keys: [:id]

Sorry if I'm asking a stupid question, I'm very new to this

Answer 1

Try this ......

<div class = "Button">
  <%= link_to "Edit this comment", edit_article_comment_path(@article.id, @comment.id) %>
</div>

In place of

<div class = "Button">
  <%= link_to "Edit this comment", edit_article_comment_path(@comment.article_id, @comment.id) %>
</div>

Hope this will work for you.

Answer 2

You article controller should be look like:

def show
  @article = Article.find(params[:id])
  @comments = @article.comments
end

Your view should be look like:

<% @comments.each do |comment| %>
  <div class = "comment">
    <p class = "author">Comment by <%= comment.author_name %>
      <span class="creationTime"> 
        <%= distance_of_time_in_words(comment.created_at, Time.now) %> ago
      </span>
    </p>
    <p class="text"><%= comment.body %></p>
    <div class = "Button">
      <%= link_to "Edit this comment", edit_article_comment_path(@article, comment) %>
    </div>
  </div>
<% end %> 

Add has_many association to Article model as well.

has_many :comments

Hope you have added article_id to comments table