Rails 5 API passing a controller varible to the model -

i'm trying create column in 1 of models uses requesting user's id generate column. current user request header:

# app/controllers/posts_controller.rb  if request.headers['authorization']   token_string = request.headers['authorization']   current_user = user.where(token: token_string).take end 

i create method in model uses current_user:

# app/models/post.rb  attr_accessor :user_voted  def user_voted(current_user)   if current_user     return postvote.where(post_id: self[:id], user_id: current_user[:id]).size > 0   else     return false   end end 

before rendering in controller do:

@articles = article.where(safe_params)       .order(order)       .limit(10)       .offset(offset)  @articles.user_voted current_user 

i following error when try run this:

nomethoderror (undefined method `user_voted' #<post::activerecord_relation:0x00000003b8fbe8>):   app/controllers/posts_controller.rb:55:in `index' 

what proper way pass controller information model?

@articles instance of post::activerecord_relation, , not instance of post. have incorporate current_user where clause in controller.

@articles = article.where(safe_params)                    .order(order)                    .limit(10)                    .offset(offset)  @did_user_vote = @articles.joins(:post_votes)                           .where(post_votes: { user_id: current_user.id })                           .exists? 

so join post_votes relation in @articles query, , posts have postvotes user.