I don't understand Hanami, I've created Message model, and I want to pull from DB message by params[:id]. The way we do it in Rails @message = Message.find(params[:id].
I read documentation, and what I did after. My Controller (for show):
def call(params)
  @message = MessageRepository.find(params[:id])
end
And my erb:
<%= @message.title %>
But it gives me error:
NoMethodError: undefined method `title' for nil:NilClass
What I did wrong?
 
                        
At the controller call
expose :message, then you can use it in the view or in the template as local variable (without the@).