diff --git a/app/models/application_model/assets.rb b/app/models/application_model/assets.rb
index 2fed16cbc..1ce5cfd3d 100644
--- a/app/models/application_model/assets.rb
+++ b/app/models/application_model/assets.rb
@@ -6,7 +6,7 @@ module ApplicationModel::Assets
 get all assets / related models for this user
 
   user = User.find(123)
-  result = user.assets( assets_if_exists )
+  result = user.assets(assets_if_exists)
 
 returns
 
@@ -19,13 +19,15 @@ returns
 
 =end
 
-  def assets (data = {})
+  def assets(data = {})
 
-    if !data[ self.class.to_app_model ]
-      data[ self.class.to_app_model ] = {}
+    app_model = self.class.to_app_model
+
+    if !data[ app_model ]
+      data[ app_model ] = {}
     end
-    if !data[ self.class.to_app_model ][ id ]
-      data[ self.class.to_app_model ][ id ] = attributes_with_associations
+    if !data[ app_model ][ id ]
+      data[ app_model ][ id ] = attributes_with_associations
     end
 
     return data if !self['created_by_id'] && !self['updated_by_id']
diff --git a/app/models/channel/assets.rb b/app/models/channel/assets.rb
index 951770e70..be20de0a7 100644
--- a/app/models/channel/assets.rb
+++ b/app/models/channel/assets.rb
@@ -8,7 +8,7 @@ class Channel
 get all assets / related models for this channel
 
   channel = Channel.find(123)
-  result = channel.assets( assets_if_exists )
+  result = channel.assets(assets_if_exists)
 
 returns
 
@@ -21,12 +21,14 @@ returns
 
 =end
 
-    def assets (data = {})
+    def assets(data = {})
 
-      if !data[ self.class.to_app_model ]
-        data[ self.class.to_app_model ] = {}
+      app_model = self.class.to_app_model
+
+      if !data[ app_model ]
+        data[ app_model ] = {}
       end
-      if !data[ self.class.to_app_model ][ id ]
+      if !data[ app_model ][ id ]
         attributes = attributes_with_associations
 
         # remove passwords if use is no admin
diff --git a/app/models/history/assets.rb b/app/models/history/assets.rb
index fbbdda635..379943414 100644
--- a/app/models/history/assets.rb
+++ b/app/models/history/assets.rb
@@ -8,7 +8,7 @@ class History
 get all assets / related models for this history entry
 
   history = History.find(123)
-  result = history.assets( assets_if_exists )
+  result = history.assets(assets_if_exists)
 
 returns
 
@@ -21,9 +21,11 @@ returns
 
 =end
 
-    def assets (data)
+    def assets(data)
 
-      if !data[ User.to_app_model ] || !data[ User.to_app_model ][ self['created_by_id'] ]
+      app_model = User.to_app_model
+
+      if !data[ app_model ] || !data[ app_model ][ self['created_by_id'] ]
         user = User.lookup(id: self['created_by_id'])
         if user
           data = user.assets(data)
diff --git a/app/models/job/assets.rb b/app/models/job/assets.rb
index 3719b6211..d13fa1278 100644
--- a/app/models/job/assets.rb
+++ b/app/models/job/assets.rb
@@ -21,16 +21,18 @@ returns
 
 =end
 
-    def assets (data)
+    def assets(data)
 
-      if !data[ Job.to_app_model ]
-        data[ Job.to_app_model ] = {}
+      app_model = Job.to_app_model
+
+      if !data[ app_model ]
+        data[ app_model ] = {}
       end
       if !data[ User.to_app_model ]
         data[ User.to_app_model ] = {}
       end
-      if !data[ Job.to_app_model ][ id ]
-        data[ Job.to_app_model ][ id ] = attributes_with_associations
+      if !data[ app_model ][ id ]
+        data[ app_model ][ id ] = attributes_with_associations
         data = assets_of_selector('condition', data)
         data = assets_of_selector('perform', data)
       end
diff --git a/app/models/organization/assets.rb b/app/models/organization/assets.rb
index 79f600c2f..6aa8172ce 100644
--- a/app/models/organization/assets.rb
+++ b/app/models/organization/assets.rb
@@ -21,20 +21,23 @@ returns
 
 =end
 
-    def assets (data)
+    def assets(data)
 
-      if !data[ Organization.to_app_model ]
-        data[ Organization.to_app_model ] = {}
+      app_model_organization = Organization.to_app_model
+      app_model_user = User.to_app_model
+
+      if !data[ app_model_organization ]
+        data[ app_model_organization ] = {}
       end
-      if !data[ User.to_app_model ]
-        data[ User.to_app_model ] = {}
+      if !data[ app_model_user ]
+        data[ app_model_user ] = {}
       end
-      if !data[ Organization.to_app_model ][ id ]
+      if !data[ app_model_organization ][ id ]
         local_attributes = attributes
 
         # set temp. current attributes to assets pool to prevent
         # loops, will be updated with lookup attributes later
-        data[ Organization.to_app_model ][ id ] = local_attributes
+        data[ app_model_organization ][ id ] = local_attributes
 
         # get organizations
         key = "Organization::member_ids::#{id}"
@@ -46,18 +49,18 @@ returns
         local_attributes['member_ids'] = local_member_ids
         if local_member_ids
           local_member_ids.each { |local_user_id|
-            next if data[ User.to_app_model ][ local_user_id ]
+            next if data[ app_model_user ][ local_user_id ]
             user = User.lookup(id: local_user_id)
             next if !user
             data = user.assets(data)
           }
         end
 
-        data[ Organization.to_app_model ][ id ] = local_attributes
+        data[ app_model_organization ][ id ] = local_attributes
       end
       %w(created_by_id updated_by_id).each { |local_user_id|
         next if !self[ local_user_id ]
-        next if data[ User.to_app_model ][ self[ local_user_id ] ]
+        next if data[ app_model_user ][ self[ local_user_id ] ]
         user = User.lookup(id: self[ local_user_id ])
         next if !user
         data = user.assets(data)
diff --git a/app/models/overview/assets.rb b/app/models/overview/assets.rb
index d29e8718f..72927b0c2 100644
--- a/app/models/overview/assets.rb
+++ b/app/models/overview/assets.rb
@@ -21,19 +21,22 @@ returns
 
 =end
 
-    def assets (data)
+    def assets(data)
 
-      if !data[ Overview.to_app_model ]
-        data[ Overview.to_app_model ] = {}
+      app_model_overview = Overview.to_app_model
+      app_model_user = User.to_app_model
+
+      if !data[ app_model_overview ]
+        data[ app_model_overview ] = {}
       end
-      if !data[ User.to_app_model ]
-        data[ User.to_app_model ] = {}
+      if !data[ app_model_user ]
+        data[ app_model_user ] = {}
       end
-      if !data[ Overview.to_app_model ][ id ]
-        data[ Overview.to_app_model ][ id ] = attributes_with_associations
+      if !data[ app_model_overview ][ id ]
+        data[ app_model_overview ][ id ] = attributes_with_associations
         if user_ids
           user_ids.each { |local_user_id|
-            next if data[ User.to_app_model ][ local_user_id ]
+            next if data[ app_model_user ][ local_user_id ]
             user = User.lookup(id: local_user_id)
             next if !user
             data = user.assets(data)
@@ -45,7 +48,7 @@ returns
       end
       %w(created_by_id updated_by_id).each { |local_user_id|
         next if !self[ local_user_id ]
-        next if data[ User.to_app_model ][ self[ local_user_id ] ]
+        next if data[ app_model_user ][ self[ local_user_id ] ]
         user = User.lookup(id: self[ local_user_id ])
         next if !user
         data = user.assets(data)
diff --git a/app/models/sla/assets.rb b/app/models/sla/assets.rb
index 64fd2d7ba..bfb9521a4 100644
--- a/app/models/sla/assets.rb
+++ b/app/models/sla/assets.rb
@@ -23,14 +23,17 @@ returns
 
     def assets (data)
 
-      if !data[ Sla.to_app_model ]
-        data[ Sla.to_app_model ] = {}
+      app_model_sla = Sla.to_app_model
+      app_model_user = User.to_app_model
+
+      if !data[ app_model_sla ]
+        data[ app_model_sla ] = {}
       end
-      if !data[ User.to_app_model ]
-        data[ User.to_app_model ] = {}
+      if !data[ app_model_user ]
+        data[ app_model_user ] = {}
       end
-      if !data[ Sla.to_app_model ][ id ]
-        data[ Sla.to_app_model ][ id ] = attributes_with_associations
+      if !data[ app_model_sla ][ id ]
+        data[ app_model_sla ][ id ] = attributes_with_associations
         data = assets_of_selector('condition', data)
         if calendar_id
           calendar = Calendar.lookup(id: calendar_id)
@@ -41,7 +44,7 @@ returns
       end
       %w(created_by_id updated_by_id).each { |local_user_id|
         next if !self[ local_user_id ]
-        next if data[ User.to_app_model ][ self[ local_user_id ] ]
+        next if data[ app_model_user ][ self[ local_user_id ] ]
         user = User.lookup(id: self[ local_user_id ])
         next if !user
         data = user.assets(data)
diff --git a/app/models/ticket/article/assets.rb b/app/models/ticket/article/assets.rb
index 169de83a1..e545ea4fa 100644
--- a/app/models/ticket/article/assets.rb
+++ b/app/models/ticket/article/assets.rb
@@ -7,7 +7,7 @@ module Ticket::Article::Assets
 get all assets / related models for this article
 
   article = Ticket::Article.find(123)
-  result = article.assets( assets_if_exists )
+  result = article.assets(assets_if_exists)
 
 returns
 
@@ -21,35 +21,39 @@ returns
 
 =end
 
-  def assets (data)
+  def assets(data)
 
-    if !data[ Ticket.to_app_model ]
-      data[ Ticket.to_app_model ] = {}
+    app_model_ticket = Ticket.to_app_model
+    app_model_article = Ticket::Article.to_app_model
+    app_model_user = User.to_app_model
+
+    if !data[ app_model_ticket ]
+      data[ app_model_ticket ] = {}
     end
-    if !data[ Ticket.to_app_model ][ ticket_id ]
-      ticket = Ticket.find( ticket_id )
+    if !data[ app_model_ticket ][ ticket_id ]
+      ticket = Ticket.lookup(id: ticket_id)
       data = ticket.assets(data)
     end
 
-    if !data[ Ticket::Article.to_app_model ]
-      data[ Ticket::Article.to_app_model ] = {}
+    if !data[ app_model_article ]
+      data[ app_model_article ] = {}
     end
-    if !data[ Ticket::Article.to_app_model ][ id ]
-      data[ Ticket::Article.to_app_model ][ id ] = attributes
+    if !data[ app_model_article ][ id ]
+      data[ app_model_article ][ id ] = attributes
 
       # add attachment list to article
-      data[ Ticket::Article.to_app_model ][ id ]['attachments'] = attachments
+      data[ app_model_article ][ id ]['attachments'] = attachments
 
-      if !data[ Ticket::Article.to_app_model ][ id ]['attachments'].empty?
-        if data[ Ticket::Article.to_app_model ][ id ]['content_type'] =~ %r{text/html}i
-          if data[ Ticket::Article.to_app_model ][ id ]['body'] =~ /<img/i
+      if !data[ app_model_article ][ id ]['attachments'].empty?
+        if data[ app_model_article ][ id ]['content_type'] =~ %r{text/html}i
+          if data[ app_model_article ][ id ]['body'] =~ /<img/i
 
             # insert inline images with urls
             attributes = Ticket::Article.insert_urls(
-              data[ Ticket::Article.to_app_model ][ id ],
-              data[ Ticket::Article.to_app_model ][ id ]['attachments']
+              data[ app_model_article ][ id ],
+              data[ app_model_article ][ id ]['attachments']
             )
-            data[ Ticket::Article.to_app_model ][ id ] = attributes
+            data[ app_model_article ][ id ] = attributes
           end
         end
       end
@@ -57,7 +61,7 @@ returns
 
     %w(created_by_id updated_by_id).each { |local_user_id|
       next if !self[ local_user_id ]
-      next if data[ User.to_app_model ] && data[ User.to_app_model ][ self[ local_user_id ] ]
+      next if data[ app_model_user ] && data[ app_model_user ][ self[ local_user_id ] ]
       user = User.lookup(id: self[ local_user_id ])
       next if !user
       data = user.assets(data)
diff --git a/app/models/ticket/assets.rb b/app/models/ticket/assets.rb
index a0de7e3c2..89de22058 100644
--- a/app/models/ticket/assets.rb
+++ b/app/models/ticket/assets.rb
@@ -20,17 +20,20 @@ returns
 
 =end
 
-  def assets (data)
+  def assets(data)
 
-    if !data[ Ticket.to_app_model ]
-      data[ Ticket.to_app_model ] = {}
+    app_model_ticket = Ticket.to_app_model
+    app_model_user = User.to_app_model
+
+    if !data[ app_model_ticket ]
+      data[ app_model_ticket ] = {}
     end
-    if !data[ Ticket.to_app_model ][ id ]
-      data[ Ticket.to_app_model ][ id ] = attributes_with_associations
+    if !data[ app_model_ticket ][ id ]
+      data[ app_model_ticket ][ id ] = attributes_with_associations
     end
     %w(created_by_id updated_by_id owner_id customer_id).each { |local_user_id|
       next if !self[ local_user_id ]
-      next if data[ User.to_app_model ] && data[ User.to_app_model ][ self[ local_user_id ] ]
+      next if data[ app_model_user ] && data[ app_model_user ][ self[ local_user_id ] ]
       user = User.lookup(id: self[ local_user_id ])
       next if !user
       data = user.assets(data)
diff --git a/app/models/user.rb b/app/models/user.rb
index 510307fb5..56592a2c0 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -685,12 +685,6 @@ returns
     # delete asset caches
     key = "User::authorizations::#{id}"
     Cache.delete(key)
-    key = "User::role_ids::#{id}"
-    Cache.delete(key)
-    key = "User::group_ids::#{id}"
-    Cache.delete(key)
-    key = "User::organization_ids::#{id}"
-    Cache.delete(key)
   end
 
   def check_name
diff --git a/app/models/user/assets.rb b/app/models/user/assets.rb
index 16bc14e9b..e0934f803 100644
--- a/app/models/user/assets.rb
+++ b/app/models/user/assets.rb
@@ -23,18 +23,20 @@ returns
 
     def assets (data)
 
-      if !data[ User.to_app_model ]
-        data[ User.to_app_model ] = {}
+      app_model = User.to_app_model
+
+      if !data[ app_model ]
+        data[ app_model ] = {}
       end
-      if !data[ User.to_app_model ][ id ]
-        local_attributes = attributes
+      if !data[ app_model ][ id ]
+        local_attributes = attributes_with_associations
 
         # do not transfer crypted pw
         local_attributes['password'] = ''
 
         # set temp. current attributes to assets pool to prevent
         # loops, will be updated with lookup attributes later
-        data[ User.to_app_model ][ id ] = local_attributes
+        data[ app_model ][ id ] = local_attributes
 
         # get linked accounts
         local_attributes['accounts'] = {}
@@ -54,30 +56,16 @@ returns
         local_attributes['accounts'] = local_accounts
 
         # get roles
-        key = "User::role_ids::#{id}"
-        local_role_ids = Cache.get(key)
-        if !local_role_ids
-          local_role_ids = role_ids
-          Cache.write(key, local_role_ids)
-        end
-        local_attributes['role_ids'] = local_role_ids
-        if local_role_ids
-          local_role_ids.each { |role_id|
+        if local_attributes['role_ids']
+          local_attributes['role_ids'].each { |role_id|
             role = Role.lookup(id: role_id)
             data = role.assets(data)
           }
         end
 
         # get groups
-        key = "User::group_ids::#{id}"
-        local_group_ids = Cache.get(key)
-        if !local_group_ids
-          local_group_ids = group_ids
-          Cache.write(key, local_group_ids)
-        end
-        local_attributes['group_ids'] = local_group_ids
-        if local_group_ids
-          local_group_ids.each { |group_id|
+        if local_attributes['group_ids']
+          local_attributes['group_ids'].each { |group_id|
             group = Group.lookup(id: group_id)
             next if !group
             data = group.assets(data)
@@ -85,22 +73,15 @@ returns
         end
 
         # get organizations
-        key = "User::organization_ids::#{id}"
-        local_organization_ids = Cache.get(key)
-        if !local_organization_ids
-          local_organization_ids = organization_ids
-          Cache.write(key, local_organization_ids)
-        end
-        local_attributes['organization_ids'] = local_organization_ids
-        if local_organization_ids
-          local_organization_ids.each { |organization_id|
+        if local_attributes['organization_ids']
+          local_attributes['organization_ids'].each { |organization_id|
             organization = Organization.lookup(id: organization_id)
             next if !organization
             data = organization.assets(data)
           }
         end
 
-        data[ User.to_app_model ][ id ] = local_attributes
+        data[ app_model ][ id ] = local_attributes
       end
 
       # add organization
@@ -114,7 +95,7 @@ returns
       end
       %w(created_by_id updated_by_id).each { |local_user_id|
         next if !self[ local_user_id ]
-        next if data[ User.to_app_model ][ self[ local_user_id ] ]
+        next if data[ app_model ][ self[ local_user_id ] ]
         user = User.lookup(id: self[ local_user_id ])
         next if !user
         data = user.assets(data)