Question

So Im working on a rails app where users can comment on photos or videos another user has uploaded and so far everything is great except I am not able to get the current user_id associated with the person who has commented on the post. This is what I have so far.

user.rb

has_many :comments,  :dependent => :destroy

photo.rb

has_many :comments, :as => :commentable

video.rb

has_many :comments, :as => :commentable

comments_controller.rb

def create
  @commentable = find_commentable
  @comment = @commentable.comments.build(params[:comment])
 if @comment.save
   redirect_to :id => nil, :notice => "Successfully created comment."
 else
   render :action => 'new'
 end
end

How can I get the user id to appear with the current comments? I have the comment type and comment id I am just looking for a way to have it so the user_id can appear. Any suggestions?

Answer 1

You should add a hidden_field to your form partial where you store the current_user.id

something like:

  <%= f.hidden_field :user_id, :value => current_user.id %> 

of course you should have a field user_id in your comment model, as a comment belongs_to user and a user has_many comments.

update:

what ofca pointed out, this can approach can lead to security issues as the hidden field could be modified by the user in the browser, e.g. using firebug.
In this case it is probably better to to leave out this field in the view and create the comment in the controller by using

<%= current_user.comments.create(params[:comment]) %>