Question

this is my form

<%= form_for([@game,@message_template]) do |f| %>

and in my controller I do this:

def edit
  @message_template = MessageTemplate.find(params[:id])
  @game = Game.where(:slug => params[:game_id])
end

My route is like this /games/:game_id/message_templates/:id

But I am getting this

undefined method `model_name’ for #

Answer 1

Try setting that arel search to return the first object (for @game).

def edit
  @message_template = MessageTemplate.find(params[:id])
  @game = Game.where(:slug => params[:game_id]).first
end

routes.rb:

#based on your comment, this will give you all (and likely more) of the paths you will need.
resources :games do
  resources :message_templates
end