diff --git a/app/models/article.rb b/app/models/article.rb
index 23dcdc5..7d7c9ff 100644
--- a/app/models/article.rb
+++ b/app/models/article.rb
@@ -127,15 +127,7 @@ class Article < ActiveRecord::Base
     {:include => 'categories_including_virtual', :conditions => { 'categories.id' => category.id }}
   }
 
-  #FIXME make this test
-  scope :newer_than, lambda { |reference_id|
-    {:conditions => ["articles.id > #{reference_id}"]}
-  }
-
-  #FIXME make this test
-  scope :older_than, lambda { |reference_id|
-    {:conditions => ["articles.id < #{reference_id}"]}
-  }
+  include TimeScopes
 
   scope :by_range, lambda { |range| {
     :conditions => [
diff --git a/app/models/comment.rb b/app/models/comment.rb
index 02c1fe3..575e96f 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -20,16 +20,7 @@ class Comment < ActiveRecord::Base
 
   scope :without_reply, :conditions => ['reply_of_id IS NULL']
 
-  #FIXME make this test
-  scope :newer_than, lambda { |reference_id|
-    {:conditions => ["comments.id > #{reference_id}"]}
-  }
-
-  #FIXME make this test
-  scope :older_than, lambda { |reference_id|
-    {:conditions => ["comments.id < #{reference_id}"]}
-  }
-
+  include TimeScopes
 
   # unauthenticated authors:
   validates_presence_of :name, :if => (lambda { |record| !record.email.blank? })
diff --git a/app/models/profile.rb b/app/models/profile.rb
index 93cb98d..5257aac 100644
--- a/app/models/profile.rb
+++ b/app/models/profile.rb
@@ -99,15 +99,7 @@ class Profile < ActiveRecord::Base
   }
   scope :no_templates, {:conditions => {:is_template => false}}
 
-  #FIXME make this test
-  scope :newer_than, lambda { |reference_id|
-    {:conditions => ["profiles.id > #{reference_id}"]}
-  }
-
-  #FIXME make this test
-  scope :older_than, lambda { |reference_id|
-    {:conditions => ["profiles.id < #{reference_id}"]}
-  }
+  include TimeScopes
 
   def members
     scopes = plugins.dispatch_scopes(:organization_members, self)
diff --git a/lib/noosfero/api/helpers.rb b/lib/noosfero/api/helpers.rb
index 489ff1c..b6ef5f4 100644
--- a/lib/noosfero/api/helpers.rb
+++ b/lib/noosfero/api/helpers.rb
@@ -73,7 +73,8 @@ module Noosfero
         order = make_order_with_parameters(params)
 
         if params[:reference_id]
-          objects = object.send(method).send("#{params.key?(:oldest) ? 'older_than' : 'newer_than'}", params[:reference_id]).where(conditions).limit(limit).order(order)
+          created_at = object.send(method).find(params[:reference_id]).created_at
+          objects = object.send(method).send("#{params.key?(:oldest) ? 'older_than' : 'younger_than'}", created_at).where(conditions).limit(limit).order(order)
         else
           objects = object.send(method).where(conditions).limit(limit).order(order)
         end
diff --git a/lib/noosfero/api/v1/comments.rb b/lib/noosfero/api/v1/comments.rb
index 6b44f4c..1af0404 100644
--- a/lib/noosfero/api/v1/comments.rb
+++ b/lib/noosfero/api/v1/comments.rb
@@ -20,7 +20,8 @@ module Noosfero
             article = find_article(environment.articles, params[:id])
   
             if params[:reference_id]
-              comments = article.comments.send("#{params.key?(:oldest) ? 'older_than' : 'newer_than'}", params[:reference_id]).reorder("created_at DESC").find(:all, :conditions => conditions, :limit => limit)
+              created_at = article.comments.find(params[:reference_id]).created_at
+              comments = article.comments.send("#{params.key?(:oldest) ? 'older_than' : 'younger_than'}", created_at).reorder("created_at DESC").find(:all, :conditions => conditions, :limit => limit)
             else
               comments = article.comments.reorder("created_at DESC").find(:all, :conditions => conditions, :limit => limit)
             end
diff --git a/lib/time_scopes.rb b/lib/time_scopes.rb
new file mode 100644
index 0000000..6642c7e
--- /dev/null
+++ b/lib/time_scopes.rb
@@ -0,0 +1,21 @@
+module TimeScopes
+  def self.included(recipient)
+    recipient.extend(ClassMethods)
+  end
+
+  module ClassMethods
+    def self.extended (base)
+      if base.respond_to?(:scope) && base.attribute_names.include?('created_at')
+        base.class_eval do
+          scope :younger_than, lambda { |created_at|
+            {:conditions => ["#{table_name}.created_at > ?", created_at]}
+          }
+
+          scope :older_than, lambda { |created_at|
+            {:conditions => ["#{table_name}.created_at < ?", created_at]}
+          }
+        end
+      end
+    end
+  end
+end
diff --git a/test/unit/profile_test.rb b/test/unit/profile_test.rb
index 5b6a9ec..5d4b0a4 100644
--- a/test/unit/profile_test.rb
+++ b/test/unit/profile_test.rb
@@ -2166,4 +2166,32 @@ class ProfileTest < ActiveSupport::TestCase
     assert_includes Profile.enabled, p2
     assert_not_includes Profile.enabled, p3
   end
+
+  should 'fetch profiles older than a specific date' do
+    p1 = fast_create(Profile, :created_at => Time.now)
+    p2 = fast_create(Profile, :created_at => Time.now - 1.day)
+    p3 = fast_create(Profile, :created_at => Time.now - 2.days)
+    p4 = fast_create(Profile, :created_at => Time.now - 3.days)
+
+    profiles = Profile.older_than(p2.created_at)
+
+    assert_not_includes profiles, p1
+    assert_not_includes profiles, p2
+    assert_includes profiles, p3
+    assert_includes profiles, p4
+  end
+
+  should 'fetch profiles younger than a specific date' do
+    p1 = fast_create(Profile, :created_at => Time.now)
+    p2 = fast_create(Profile, :created_at => Time.now - 1.day)
+    p3 = fast_create(Profile, :created_at => Time.now - 2.days)
+    p4 = fast_create(Profile, :created_at => Time.now - 3.days)
+
+    profiles = Profile.younger_than(p3.created_at)
+
+    assert_includes profiles, p1
+    assert_includes profiles, p2
+    assert_not_includes profiles, p3
+    assert_not_includes profiles, p4
+  end
 end
diff --git a/test/unit/time_scopes.rb b/test/unit/time_scopes.rb
new file mode 100644
index 0000000..d67eb15
--- /dev/null
+++ b/test/unit/time_scopes.rb
@@ -0,0 +1,34 @@
+# encoding: UTF-8
+require_relative "../test_helper"
+
+#FIXME Find a way to test with a generic example
+
+class TimeScopesTest < ActiveSupport::TestCase
+  should 'fetch profiles older than a specific date' do
+    p1 = fast_create(Profile, :created_at => Time.now)
+    p2 = fast_create(Profile, :created_at => Time.now - 1.day)
+    p3 = fast_create(Profile, :created_at => Time.now - 2.days)
+    p4 = fast_create(Profile, :created_at => Time.now - 3.days)
+
+    profiles = Profile.older_than(p2.created_at)
+
+    assert_not_includes profiles, p1
+    assert_not_includes profiles, p2
+    assert_includes profiles, p3
+    assert_includes profiles, p4
+  end
+
+  should 'fetch profiles younger than a specific date' do
+    p1 = fast_create(Profile, :created_at => Time.now)
+    p2 = fast_create(Profile, :created_at => Time.now - 1.day)
+    p3 = fast_create(Profile, :created_at => Time.now - 2.days)
+    p4 = fast_create(Profile, :created_at => Time.now - 3.days)
+
+    profiles = Profile.younger_than(p3.created_at)
+
+    assert_includes profiles, p1
+    assert_includes profiles, p2
+    assert_not_includes profiles, p3
+    assert_not_includes profiles, p4
+  end
+end
--
libgit2 0.21.2