refactored search

app/models/janitor_trial.rb

@@ -6,6 +6,17 @@ class JanitorTrial < ActiveRecord::Base
   after_destroy :create_feedback
   validates_presence_of :user
   before_validation :initialize_creator
+  
+  def self.search(params)
+    q = scoped
+    return q if params.blank?
+    
+    if params[:user_name]
+      q = q.where("user_id = (select _.id from users _ where lower(_.name) = ?)", params[:user_name].downcase)
+    end
+    
+    q
+  end
     
   def initialize_creator
     self.creator_id = CurrentUser.id