Remove group name validation case sensitivity

db/migrate/20141216112341_resolve_duplicate_group_names.rb

@@ -0,0 +1,23 @@
+class ResolveDuplicateGroupNames < ActiveRecord::Migration
+
+  def up
+    results = Group.exec_sql 'SELECT id FROM groups
+                              WHERE name ILIKE
+                               (SELECT lower(name)
+                                FROM groups
+                                GROUP BY lower(name)
+                                HAVING count(*) > 1);'
+
+    groups  = Group.where id: results.map { |r| r['id'] }
+    groups.group_by { |g| g.name.downcase }.each do |key, value|
+      value.each_with_index do |dup, index|
+        dup.update! name: "#{dup.name[0..18]}_#{index+1}" if index > 0
+      end
+    end
+  end
+
+  def down
+    # does not reverse changes
+  end
+
+end