Fixes for voting on proposals. 0 for no voting option. Set default value in migration to avoid blank/null problems.

app/models/call_for_papers.rb

@@ -3,6 +3,6 @@ class CallForPapers < ActiveRecord::Base
   belongs_to :conference
 
   validates_presence_of :start_date, :end_date, :hard_deadline
-  validates :rating, :numericality => { :greater_than_or_equal_to => 1, :less_than_or_equal_to => 10 }
+  validates :rating, :numericality => { :greater_than_or_equal_to => 0, :less_than_or_equal_to => 10 }
 
 end

app/views/admin/callforpapers/show.html.haml

@@ -9,6 +9,6 @@
         = f.input :hard_deadline, :as => :string, :input_html => { :id => "cfp-hard-datepicker", :readonly => "readonly"  }
         = f.input :description, :hint => "Welcome text for the Call for Papers"
         = f.input :schedule_changes
-        = f.input :rating, :hint => "Enter the number of different rating levels you want to have for voting on proposals."
+        = f.input :rating, :hint => "Enter the number of different rating levels you want to have for voting on proposals. Enter 0 if you do not want to vote on proposals."
         = f.input :rating_desc, :label => "Rating Description", :hint => "Enter comments about voting process.", :input_html => {:value => "1 is for 'I don't like this proposal',\n2 is for 'I am ok with this proposal.',\n3 is for 'I love this proposal!'", :rows => 5, :class => "span6"}
         = f.action :submit, :as => :button, :button_html => {:class => "btn btn-primary"}

db/migrate/20131228132353_change_default_rating_in_call_for_papers.rb

@@ -0,0 +1,8 @@
+class ChangeDefaultRatingInCallForPapers < ActiveRecord::Migration
+  def up
+    change_column :call_for_papers, :rating, :integer, :default => 3
+  end
+
+  def down
+  end
+end