gistfile1.rb

# app/controllers/documents_controller.rb  

  def new
    @document = Document.new
  end

  def create
    @document = current_user.documents.build(document_params)
    if @document.save
      render :new
    else
      render :new
    end

  end

# config/routes.rb

resources :documents, only: [:new, :create, :index]


# app/views/documents/new.html.haml

#document.create
  %h2= t(".title")

  = simple_form_for @document do |form|
    = render partial: '/documents/form', object: form

    .submit-field
      = form.submit