Ruby on Rails Formtastic Multiple Options in Member_Label

I have a relational model where use开发者_运维百科rs have managers that are also users. The below code works great and does exactly what it's suppose to, but it's only displaying the first name of the manager. I'm trying to get this to show both the first name and the last name of the manager.

<%= sf.input :managers, :as => :check_boxes, :member_label => (:firstname)  ,:input_html => { :size => 20, :multiple => true}%>

The other field i'm trying to add is the :lastname. I cannot figure out how to get :member_label to take both fields.

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I figured it out. By using the Proc.new, I was able to add in both first name and last name.

<%= sf.input :managers, :as => :check_boxes, :member_label => Proc.new { |t| h(t.firstname + " " + t.lastname) }  ,:input_html => { :size => 20, :multiple => true}%>