Ruby on Rails

I make it working finally, here is my code, maybe it can help other:

(i'm on rails 5)

The link on my product page:

<%= link_to "Contactar", new_conversation_path(recipient_id: service.user.id) %>

My new and create action on my conversation controller:

 def new   @recipients = User.find(params[:recipient_id])     end     def create   recipient = User.find_by(id: params[:recipient_id])   receipt = current_user.send_message(recipient, params[:body],    params[:subject])   redirect_to conversation_path(receipt.conversation)   end