refactored search

app/models/user_feedback.rb

@@ -6,11 +6,38 @@ class UserFeedback < ActiveRecord::Base
   attr_accessible :body, :user_id, :category, :user_name
   validates_presence_of :user, :creator, :body, :category
   validate :creator_is_privileged
-  scope :positive, where("category = ?", "positive")
-  scope :neutral, where("category = ?", "neutral")
-  scope :negative, where("category = ?", "negative")
-  scope :for_user, lambda {|user_id| where("user_id = ?", user_id)}
+
+  module SearchMethods
+    def positive
+      where("category = ?", "positive")
+    end
     
+    def neutral
+      where("category = ?", "neutral")
+    end
+    
+    def negative
+      where("category = ?", "negative")
+    end
+    
+    def for_user(user_id)
+      where("user_id = ?", user_id)
+    end
+    
+    def search(params)
+      q = scoped
+      return q if params.blank?
+      
+      if params[:user_id]
+        q = q.for_user(params[:user_id].to_i)
+      end
+      
+      q
+    end
+  end
+    
+  extend SearchMethods
+  
   def initialize_creator
     self.creator_id = CurrentUser.id
   end