Adding threading and email subscriptions to comments [closed] - ruby-on-rails

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I've built a simple rails app with three models, Posts, Users, and Comments.
I've tried every commenting gem out there and they all have some shortfall.
So I build my own comments system.
Users can comment on Posts. Every comment is votable (using acts_as_votable gem). A users score is made up by the sum total votes they have received on their comments.
Here is what I have in my schema for the comments:
create_table "comments", force: true do |t|
t.text "body"
t.datetime "created_at"
t.datetime "updated_at"
t.integer "user_id"
t.integer "post_id"
end
In my user model:
class User < ActiveRecord::Base
has_many :comments
acts_as_voter
end
In my post model:
class Post < ActiveRecord::Base
has_many :comments
end
In my comment model:
class Comment < ActiveRecord::Base
belongs_to :post
belongs_to :user
acts_as_votable
end
In my comments controller:
class CommentsController < ApplicationController
def create
post.comments.create(new_comment_params) do |comment|
comment.user = current_user
end
respond_to do |format|
format.html {redirect_to post_path(post)}
end
end
def upvote
#post = Post.find(params[:post_id])
#comment = #post.comments.find(params[:id])
#comment.liked_by current_user
respond_to do |format|
format.html {redirect_to #post}
end
end
private
def new_comment_params
params.require(:comment).permit(:body)
end
def post
#post = Post.find(params[:post_id])
end
end
In my routes file:
resources :posts do
resources :comments do
member do
put "like", to: "comments#upvote"
end
end
end
In my view:
<% #post.comments.each do |comment| %>
<%= comment.body %>
<% if user_signed_in? && (current_user != comment.user) && !(current_user.voted_for? comment) %>
<%= link_to “up vote”, like_post_comment_path(#post, comment), method: :put %>
<%= comment.votes.size %>
<% else %>
<%= comment.votes.size %></a>
<% end %>
<% end %>
<br />
<%= form_for([#post, #post.comments.build]) do |f| %>
<p><%= f.text_area :body, :cols => "80", :rows => "10" %></p>
<p><%= f.submit “comment” %></p>
<% end %>
In the user profile views: (this shows the users score
<%= (#user.comments.map{|c| c.votes.count}.inject(:+))%>
How do I implement threading?(at one level, I'm assuming multiple levels just makes it really messy)
How do I make the threaded comments votable?(both the parents and children) What has to be done with the routes?
How do I ad a simple email notification a user can subscribe to to receive a simple message saying that a new comment has been posted to their thread?
How do I pull the users score calculated by all votes received on comments made by the user including child comments?

Answer 1

If I understand the question correctly, you want to allow comments to be commented on. In that case, in your Comment model you will need a parent_id:integer attribute. Then add the following associations :
class Comment
...
belongs_to :parent, class_name: 'Comment'
has_many :children, class_name: 'Comment', foreign_key: 'parent_id'
...
end
Now you have a tree structure for your comments. This allows comments of comments of comments and so on.
if my_comment.parent.nil? then you are at the root. if my_comment.children.empty? then there are no comments on the comment.
Trees can be expensive to move through, so adding a max depth could be smart.

Answer 2

How do you implement threading? (To answer one of your questions)
Make the comment-to-user association polymorphic, and then you can add a comment-to-comment association the same way.
What was the 'shortfall' you found with existing gems that prevented you doing this? (Since acts_as_commentable supports this out if the box)