Merge pull request #2372 from vikhyat/badge-system

Multiple grant badges

db/migrate/20140520062826_add_multiple_award_to_badges.rb

@@ -0,0 +1,17 @@
+class AddMultipleAwardToBadges < ActiveRecord::Migration
+  def change
+    add_column :badges, :multiple_grant, :boolean, default: false, null: false
+
+    reversible do |dir|
+      dir.up do
+        remove_index :user_badges, column: [:badge_id, :user_id]
+        add_index :user_badges, [:badge_id, :user_id]
+      end
+
+      dir.down do
+        remove_index :user_badges, column: [:badge_id, :user_id]
+        add_index :user_badges, [:badge_id, :user_id], unique: true
+      end
+    end
+  end
+end