Show length of event types in new proposal drop down

app/helpers/application_helper.rb

@@ -15,6 +15,21 @@ module ApplicationHelper
     end
   end
 
+  def show_time(length)
+    h = length / 60
+    min = length - h * 60
+
+    if h != 0
+      if min != 0
+      "#{h} h #{min} min"
+      else
+        "#{h} h"
+      end
+    else
+      "#{min} min"
+    end
+  end
+
   def add_association_link(association_name, form_builder, div_class, html_options = {})
     link_to_add_association "Add " + association_name.to_s.singularize, form_builder, div_class, html_options.merge(:class => "assoc btn btn-success")
   end

app/models/event_type.rb

@@ -2,4 +2,6 @@ class EventType < ActiveRecord::Base
   attr_accessible :title, :length, :minimum_abstract_length, :maximum_abstract_length
 
   belongs_to :conference
+
+  validates :length, :numericality => {:greater_than => 0} 
 end

app/views/proposal/_proposal_form.html.haml

@@ -14,7 +14,7 @@
       %br
       %br
     - else
-      = f.input :event_type_id,:as => :select, :collection => @event_types, :include_blank => false, :label => "Session Type"
+      = f.input :event_type_id,:as => :select, :collection => @event_types.map {|x| ["#{x.title} - #{show_time(x.length)}", x.id]}, :include_blank => false, :label => "Session Type"
     = f.input :require_registration
     = f.input :abstract, :input_html => {:rows => 5, :class => "span11"},
       :required => true, :label => "Session Abstract"