diff --git a/app/controllers/links_controller.rb b/app/controllers/links_controller.rb
index d1a5907cf..c82179d5d 100644
--- a/app/controllers/links_controller.rb
+++ b/app/controllers/links_controller.rb
@@ -15,7 +15,7 @@ class LinksController < ApplicationController
     links.each { |item|
       link_list.push item
       if item['link_object'] == 'Ticket'
-        data = Ticket.full_data( item['link_object_value'] )
+        data = Ticket.lookup( :id => item['link_object_value'] )
         tickets.push data
         if !users[ data['owner_id'] ]
           users[ data['owner_id'] ] = User.user_data_full( data['owner_id'] )
diff --git a/app/controllers/ticket_overviews_controller.rb b/app/controllers/ticket_overviews_controller.rb
index 08ce63d8b..da4660c93 100644
--- a/app/controllers/ticket_overviews_controller.rb
+++ b/app/controllers/ticket_overviews_controller.rb
@@ -50,7 +50,7 @@ class TicketOverviewsController < ApplicationController
     users = {}
     tickets = []
     overview[:ticket_list].each {|ticket_id|
-      data = Ticket.full_data(ticket_id)
+      data = Ticket.lookup( :id => ticket_id )
       tickets.push data
       if !users[ data['owner_id'] ]
         users[ data['owner_id'] ] = User.user_data_full( data['owner_id'] )
diff --git a/app/controllers/tickets_controller.rb b/app/controllers/tickets_controller.rb
index bff507df5..4b2207639 100644
--- a/app/controllers/tickets_controller.rb
+++ b/app/controllers/tickets_controller.rb
@@ -225,7 +225,7 @@ class TicketsController < ApplicationController
     users = {}
     tickets = []
     ticket_list.each {|ticket|
-      data = Ticket.full_data(ticket.id)
+      data = Ticket.lookup( :id => ticket.id )
       tickets.push data
       if !users[ data['owner_id'] ]
         users[ data['owner_id'] ] = User.user_data_full( data['owner_id'] )
@@ -508,7 +508,7 @@ class TicketsController < ApplicationController
     tickets = []
     users = {}
     tickets_all.each do |ticket|
-      ticket_tmp = Ticket.full_data(ticket.id)
+      ticket_tmp = Ticket.lookup( :id => ticket.id )
       tickets.push ticket_tmp
       users[ ticket['owner_id'] ] = User.user_data_full( ticket_tmp['owner_id'] )
       users[ ticket['customer_id'] ] = User.user_data_full( ticket_tmp['customer_id'] )
diff --git a/app/models/application_model.rb b/app/models/application_model.rb
index 2c34185b4..c3e499b6e 100644
--- a/app/models/application_model.rb
+++ b/app/models/application_model.rb
@@ -3,6 +3,10 @@ require 'cache'
 class ApplicationModel < ActiveRecord::Base
   self.abstract_class = true
 
+  after_create  :cache_delete
+  after_update  :cache_delete
+  after_destroy :cache_delete
+
   def self.param_cleanup(params)
     data = {}
     self.new.attributes.each {|item|
@@ -40,6 +44,28 @@ class ApplicationModel < ActiveRecord::Base
     Cache.get( key.to_s )
   end
 
+  def self.lookup(data)
+    if data[:id]
+#      puts "GET- + #{self.to_s}.#{data[:id].to_s}"
+      cache = self.cache_get( data[:id] )
+      return cache if cache
+
+#      puts "Fillup- + #{self.to_s}.#{data[:id].to_s}"
+      record = self.where( :id => data[:id] ).first
+      self.cache_set( data[:id], record )
+      return record
+    elsif data[:name]
+      cache = self.cache_get( data[:name] )
+      return cache if cache
+
+      record = self.where( :name => data[:name] ).first
+      self.cache_set( data[:name], record )
+      return record
+    else
+      raise "Need name or id for lookup()"
+    end
+  end
+
   def self.create_if_not_exists(data)
     if data[:name]
       record = self.where( :name => data[:name] ).first
diff --git a/app/models/authorization.rb b/app/models/authorization.rb
index 309b382a2..900013578 100644
--- a/app/models/authorization.rb
+++ b/app/models/authorization.rb
@@ -3,10 +3,6 @@ class Authorization < ApplicationModel
   validates_presence_of   :user_id, :uid, :provider
   validates_uniqueness_of :uid,     :scope => :provider
   
-  after_create            :cache_delete
-  after_update            :cache_delete
-  after_destroy           :cache_delete
-  
   def self.find_from_hash(hash)
     auth = Authorization.where( :provider => hash['provider'], :uid => hash['uid'] ).first
     if auth
diff --git a/app/models/email_address.rb b/app/models/email_address.rb
index 73817e606..848131f0b 100644
--- a/app/models/email_address.rb
+++ b/app/models/email_address.rb
@@ -1,8 +1,5 @@
 class EmailAddress < ApplicationModel
-  has_many                :groups,         :after_add => :cache_update, :after_remove => :cache_update
-  after_create            :cache_delete
-  after_update            :cache_delete
-  after_destroy           :cache_delete
+  has_many                :groups,   :after_add => :cache_update, :after_remove => :cache_update
   validates               :realname, :presence => true
   validates               :email,    :presence => true
 end
diff --git a/app/models/group.rb b/app/models/group.rb
index a98de29d9..08b688dad 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -2,8 +2,5 @@ class Group < ApplicationModel
   has_and_belongs_to_many :users,         :after_add => :cache_update, :after_remove => :cache_update
   belongs_to              :email_address
   belongs_to              :signature
-  after_create            :cache_delete
-  after_update            :cache_delete
-  after_destroy           :cache_delete
   validates               :name, :presence => true
 end
diff --git a/app/models/history.rb b/app/models/history.rb
index 8d0cfc80f..84ed180e0 100644
--- a/app/models/history.rb
+++ b/app/models/history.rb
@@ -1,4 +1,4 @@
-class History < ActiveRecord::Base
+class History < ApplicationModel
   self.table_name = 'histories'
   belongs_to :history_type,             :class_name => 'History::Type'
   belongs_to :history_object,           :class_name => 'History::Object'
@@ -349,13 +349,13 @@ class History < ActiveRecord::Base
       return history_attribute
     end
 
-  class Object < ActiveRecord::Base
+  class Object < ApplicationModel
   end
 
-  class Type < ActiveRecord::Base
+  class Type < ApplicationModel
   end
 
-  class Attribute < ActiveRecord::Base
+  class Attribute < ApplicationModel
   end
 
 end
diff --git a/app/models/observer/ticket/article/communicate_email.rb b/app/models/observer/ticket/article/communicate_email.rb
index abd139c8d..d876fd1bd 100644
--- a/app/models/observer/ticket/article/communicate_email.rb
+++ b/app/models/observer/ticket/article/communicate_email.rb
@@ -7,16 +7,16 @@ class Observer::Ticket::Article::CommunicateEmail < ActiveRecord::Observer
     return if Setting.get('import_mode')
 
     # if sender is customer, do not communication
-    sender = Ticket::Article::Sender.where( :id => record.ticket_article_sender_id ).first
+    sender = Ticket::Article::Sender.lookup( :id => record.ticket_article_sender_id )
     return 1 if sender == nil
     return 1 if sender['name'] == 'Customer'
 
     # only apply on emails
-    type = Ticket::Article::Type.where( :id => record.ticket_article_type_id ).first
+    type = Ticket::Article::Type.lookup( :id => record.ticket_article_type_id )
     return if type['name'] != 'email'
 
     # build subject
-    ticket = Ticket.find(record.ticket_id)
+    ticket = Ticket.lookup( record.ticket_id )
     subject = ticket.subject_build( record.subject )
 
     # send email
diff --git a/app/models/observer/ticket/article/communicate_facebook.rb b/app/models/observer/ticket/article/communicate_facebook.rb
index dea3b73b2..84cc0305d 100644
--- a/app/models/observer/ticket/article/communicate_facebook.rb
+++ b/app/models/observer/ticket/article/communicate_facebook.rb
@@ -7,12 +7,12 @@ class Observer::Ticket::Article::CommunicateFacebook < ActiveRecord::Observer
     return if Setting.get('import_mode')
 
     # if sender is customer, do not communication
-    sender = Ticket::Article::Sender.where( :id => record.ticket_article_sender_id ).first
+    sender = Ticket::Article::Sender.lookup( :id => record.ticket_article_sender_id )
     return 1 if sender == nil
     return 1 if sender['name'] == 'Customer'
 
     # only apply on emails
-    type = Ticket::Article::Type.where( :id => record.ticket_article_type_id ).first
+    type = Ticket::Article::Type.lookup( :id => record.ticket_article_type_id )
     return if type['name'] != 'facebook'
 
     a = Channel::Facebook.new
diff --git a/app/models/observer/ticket/article/communicate_twitter.rb b/app/models/observer/ticket/article/communicate_twitter.rb
index ef31a22ea..792a1c6e1 100644
--- a/app/models/observer/ticket/article/communicate_twitter.rb
+++ b/app/models/observer/ticket/article/communicate_twitter.rb
@@ -7,12 +7,12 @@ class Observer::Ticket::Article::CommunicateTwitter < ActiveRecord::Observer
     return if Setting.get('import_mode')
 
     # if sender is customer, do not communication
-    sender = Ticket::Article::Sender.where( :id => record.ticket_article_sender_id ).first
+    sender = Ticket::Article::Sender.lookup( :id => record.ticket_article_sender_id )
     return 1 if sender == nil
     return 1 if sender['name'] == 'Customer'
 
     # only apply on tweets
-    type = Ticket::Article::Type.where( :id => record.ticket_article_type_id ).first
+    type = Ticket::Article::Type.lookup( :id => record.ticket_article_type_id )
     return if type['name'] != 'twitter direct-message' && type['name'] != 'twitter status'
 
     a = Channel::Twitter2.new
diff --git a/app/models/observer/ticket/article/fillup_from_email.rb b/app/models/observer/ticket/article/fillup_from_email.rb
index 6b5ac917d..ba9196c62 100644
--- a/app/models/observer/ticket/article/fillup_from_email.rb
+++ b/app/models/observer/ticket/article/fillup_from_email.rb
@@ -7,16 +7,16 @@ class Observer::Ticket::Article::FillupFromEmail < ActiveRecord::Observer
     return if Setting.get('import_mode')
 
     # if sender is customer, do not change anything
-    sender = Ticket::Article::Sender.where( :id => record.ticket_article_sender_id ).first
+    sender = Ticket::Article::Sender.lookup( :id => record.ticket_article_sender_id )
     return if sender == nil
     return if sender['name'] == 'Customer'
 
     # set email attributes
-    type = Ticket::Article::Type.where( :id => record.ticket_article_type_id ).first
+    type = Ticket::Article::Type.lookup( :id => record.ticket_article_type_id )
     return if type['name'] != 'email'
 
     # set subject if empty
-    ticket = Ticket.find( record.ticket_id )
+    ticket = Ticket.lookup( :id => record.ticket_id )
     if !record.subject || record.subject == ''
       record.subject = ticket.title
     end
diff --git a/app/models/observer/ticket/article/fillup_from_general.rb b/app/models/observer/ticket/article/fillup_from_general.rb
index fc7678da8..f4a3580c4 100644
--- a/app/models/observer/ticket/article/fillup_from_general.rb
+++ b/app/models/observer/ticket/article/fillup_from_general.rb
@@ -7,7 +7,7 @@ class Observer::Ticket::Article::FillupFromGeneral < ActiveRecord::Observer
     return if Setting.get('import_mode')
 
     # if sender is customer, do not change anything
-    sender = Ticket::Article::Sender.where( :id => record.ticket_article_sender_id ).first
+    sender = Ticket::Article::Sender.lookup( :id => record.ticket_article_sender_id )
     return if sender == nil
     return if sender['name'] == 'Customer'
 
diff --git a/app/models/observer/ticket/close_time.rb b/app/models/observer/ticket/close_time.rb
index de13d3e43..2fbac2027 100644
--- a/app/models/observer/ticket/close_time.rb
+++ b/app/models/observer/ticket/close_time.rb
@@ -20,8 +20,8 @@ class Observer::Ticket::CloseTime < ActiveRecord::Observer
       return true if record.close_time
 
       # check if ticket is closed now
-      ticket_state = Ticket::State.find( record.ticket_state_id )
-      ticket_state_type = Ticket::StateType.find( ticket_state.ticket_state_type_id )
+      ticket_state = Ticket::State.lookup( :id => record.ticket_state_id )
+      ticket_state_type = Ticket::StateType.lookup( :id => ticket_state.ticket_state_type_id )
       return true if ticket_state_type.name != 'closed'
 
       # set close_time
diff --git a/app/models/observer/ticket/first_response.rb b/app/models/observer/ticket/first_response.rb
index 503670ace..e4949a31b 100644
--- a/app/models/observer/ticket/first_response.rb
+++ b/app/models/observer/ticket/first_response.rb
@@ -11,10 +11,10 @@ class Observer::Ticket::FirstResponse < ActiveRecord::Observer
     return true if record.internal
 
     # if sender is not agent
-    return true if record.ticket_article_sender.name != 'Agent'
+    return true if Ticket::Article::Sender.lookup( :id => record.ticket_article_sender_id ).name != 'Agent'
 
     # if article is a message to customer
-    return true if !record.ticket_article_type.communication
+    return true if !Ticket::Article::Type.lookup( :id => record.ticket_article_type_id ).communication
 
     # check if first_response is already set
     return true if record.ticket.first_response
diff --git a/app/models/observer/ticket/last_contact.rb b/app/models/observer/ticket/last_contact.rb
index a02f68624..c6a7cb489 100644
--- a/app/models/observer/ticket/last_contact.rb
+++ b/app/models/observer/ticket/last_contact.rb
@@ -8,10 +8,11 @@ class Observer::Ticket::LastContact < ActiveRecord::Observer
     return true if record.internal
 
     # if article is a message to customer
-    return true if !record.ticket_article_type.communication
+    return true if !Ticket::Article::Type.lookup( :id => record.ticket_article_type_id ).communication
 
     # if sender is not customer
-    if record.ticket_article_sender.name == 'Customer'
+    sender = Ticket::Article::Sender.lookup( :id => record.ticket_article_sender_id )
+    if sender.name == 'Customer'
 
       # check if last communication is done by agent, else do not set last_contact_customer
       if record.ticket.last_contact_customer == nil ||
@@ -28,7 +29,7 @@ class Observer::Ticket::LastContact < ActiveRecord::Observer
     end
 
     # if sender is not agent
-    if record.ticket_article_sender.name == 'Agent'
+    if sender.name == 'Agent'
 
       # set last_contact_agent
       record.ticket.last_contact_agent = Time.now
diff --git a/app/models/observer/ticket/notification.rb b/app/models/observer/ticket/notification.rb
index a82981a0b..5c8b6a18e 100644
--- a/app/models/observer/ticket/notification.rb
+++ b/app/models/observer/ticket/notification.rb
@@ -16,10 +16,10 @@ class Observer::Ticket::Notification < ActiveRecord::Observer
 
       # get current state of objects
       if event[:name] == 'Ticket::Article'
-        article = Ticket::Article.find( event[:id] )
+        article = Ticket::Article.lookup( :id => event[:id] )
         ticket  = article.ticket
       else
-        ticket  = Ticket.find( event[:id] )
+        ticket  = Ticket.lookup( :id => event[:id] )
         article = ticket.articles[-1]
       end
 
diff --git a/app/models/role.rb b/app/models/role.rb
index f2e573cdb..a565ff56d 100644
--- a/app/models/role.rb
+++ b/app/models/role.rb
@@ -1,7 +1,4 @@
 class Role < ApplicationModel
   has_and_belongs_to_many :users,         :after_add => :cache_update, :after_remove => :cache_update
-  after_create            :cache_delete
-  after_update            :cache_delete
-  after_destroy           :cache_delete
   validates               :name, :presence => true
 end
diff --git a/app/models/setting.rb b/app/models/setting.rb
index ddd63bb4b..b17c02520 100644
--- a/app/models/setting.rb
+++ b/app/models/setting.rb
@@ -3,9 +3,6 @@ class Setting < ApplicationModel
   store         :state
   store         :state_initial
   before_create :set_initial
-  after_create  :delete_cache
-  after_update  :delete_cache
-  after_destroy :delete_cache
 
   def self.load
 
diff --git a/app/models/signature.rb b/app/models/signature.rb
index f4a1dee16..54b2dc01b 100644
--- a/app/models/signature.rb
+++ b/app/models/signature.rb
@@ -1,7 +1,4 @@
 class Signature < ApplicationModel
-  has_many                :groups,         :after_add => :cache_update, :after_remove => :cache_update
-  after_create            :cache_delete
-  after_update            :cache_delete
-  after_destroy           :cache_delete
-  validates               :name, :presence => true
+  has_many                :groups,  :after_add => :cache_update, :after_remove => :cache_update
+  validates               :name,    :presence => true
 end
diff --git a/app/models/ticket.rb b/app/models/ticket.rb
index 3457700aa..df75a43b9 100644
--- a/app/models/ticket.rb
+++ b/app/models/ticket.rb
@@ -2,7 +2,7 @@ class Ticket < ApplicationModel
   before_create   :number_generate, :check_defaults
   before_update   :check_defaults
   before_destroy  :destroy_dependencies
-  
+
   belongs_to    :group
   has_many      :articles,              :class_name => 'Ticket::Article', :after_add => :cache_update, :after_remove => :cache_update
   belongs_to    :organization
@@ -14,16 +14,12 @@ class Ticket < ApplicationModel
   belongs_to    :create_article_type,   :class_name => 'Ticket::Article::Type'
   belongs_to    :create_article_sender, :class_name => 'Ticket::Article::Sender'
 
-  after_create  :cache_delete
-  after_update  :cache_delete
-  after_destroy :cache_delete
-
   def self.number_check (string)
     self.number_adapter.number_check_item(string)
   end
 
   def agent_of_group
-    Group.find(self.group_id).users.where( :active => true ).joins(:roles).where( 'roles.name' => 'Agent', 'roles.active' => true ).uniq()
+    Group.find( self.group_id ).users.where( :active => true ).joins(:roles).where( 'roles.name' => 'Agent', 'roles.active' => true ).uniq()
   end
 
   def self.agents
@@ -41,8 +37,8 @@ class Ticket < ApplicationModel
     Ticket::Article.create(
       :created_by_id            => data[:created_by_id],
       :ticket_id                => self.id, 
-      :ticket_article_type_id   => Ticket::Article::Type.where( :name => 'note' ).first.id,
-      :ticket_article_sender_id => Ticket::Article::Sender.where( :name => 'Agent' ).first.id,
+      :ticket_article_type_id   => Ticket::Article::Type.lookup( :name => 'note' ).id,
+      :ticket_article_sender_id => Ticket::Article::Sender.lookup( :name => 'Agent' ).id,
       :body                     => 'merged',
       :internal                 => false
     )
@@ -59,7 +55,7 @@ class Ticket < ApplicationModel
     )
 
     # set state to 'merged'
-    self.ticket_state_id = Ticket::State.where( :name => 'merged' ).first.id
+    self.ticket_state_id = Ticket::State.lookup( :name => 'merged' ).id
 
     # rest owner
     self.owner_id = User.where( :login => '-' ).first.id
@@ -304,16 +300,6 @@ class Ticket < ApplicationModel
 
   end
 
-#  data = Ticket.full_data(123)
-  def self.full_data(ticket_id)
-    cache = self.cache_get(ticket_id)
-    return cache if cache
-
-    ticket = Ticket.find(ticket_id).attributes
-    self.cache_set( ticket_id, ticket )
-    return ticket
-  end
-
 #  Ticket.create_attributes(
 #    :current_user_id => 123,
 #  )
@@ -428,24 +414,15 @@ class Ticket < ApplicationModel
 
   class Priority < ApplicationModel
     self.table_name = 'ticket_priorities'
-    after_create  :cache_delete
-    after_update  :cache_delete
-    after_destroy :cache_delete
     validates     :name, :presence => true
   end
 
   class StateType < ApplicationModel
-    after_create  :cache_delete
-    after_update  :cache_delete
-    after_destroy :cache_delete
     validates     :name, :presence => true
   end
 
   class State < ApplicationModel
-    belongs_to :ticket_state_type, :class_name => 'Ticket::StateType'
-    after_create  :cache_delete
-    after_update  :cache_delete
-    after_destroy :cache_delete
+    belongs_to    :ticket_state_type, :class_name => 'Ticket::StateType'
     validates     :name, :presence => true
   end
 end
\ No newline at end of file
diff --git a/app/models/ticket/article.rb b/app/models/ticket/article.rb
index 034904f80..dfaefa717 100644
--- a/app/models/ticket/article.rb
+++ b/app/models/ticket/article.rb
@@ -5,10 +5,6 @@ class Ticket::Article < ApplicationModel
   belongs_to    :ticket_article_sender, :class_name => 'Ticket::Article::Sender'
   belongs_to    :created_by,            :class_name => 'User'
 
-  after_create  :cache_delete
-  after_update  :cache_delete
-  after_destroy :cache_delete
-
   private
     def attachment_check
 
diff --git a/app/models/user.rb b/app/models/user.rb
index e7e8eb8ce..933938ccf 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -3,9 +3,6 @@ class User < ApplicationModel
 
   before_create           :check_name, :check_email, :check_login, :check_image, :check_geo
   before_update           :check_password, :check_image, :check_geo, :check_email, :check_login
-  after_create            :cache_delete
-  after_update            :cache_delete
-  after_destroy           :cache_delete
 
   has_and_belongs_to_many :groups,          :after_add => :cache_update, :after_remove => :cache_update
   has_and_belongs_to_many :roles,           :after_add => :cache_update, :after_remove => :cache_update
diff --git a/lib/session.rb b/lib/session.rb
index 1b2d2eacc..e17706a48 100644
--- a/lib/session.rb
+++ b/lib/session.rb
@@ -434,7 +434,7 @@ class ClientState
       return if !session_data
       return if !session_data[:user]
       return if !session_data[:user][:id]
-      user = User.find( session_data[:user][:id] )
+      user = User.lookup( :id => session_data[:user][:id] )
       return if !user
 
       # set cache key
@@ -691,7 +691,7 @@ class ClientState
     if !@pushed[:tickets]
       @pushed[:tickets] = {}
     end
-    ticket = Ticket.full_data(ticket_id)
+    ticket = Ticket.lookup( :id => ticket_id )
     if @pushed[:tickets][ticket_id] != ticket['updated_at']
       @pushed[:tickets][ticket_id] = ticket['updated_at']
       tickets.push ticket