diff --git a/.rubocop.yml b/.rubocop.yml
index f220c0422..ec87de0af 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -200,8 +200,6 @@ Rails/TimeZone:
   Enabled: false
 Lint/RescueException:
   Enabled: false
-Style/PredicateName:
-  Enabled: false
 Style/ClassVars:
   Enabled: false
 Lint/UselessAssignment:
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 08676a53e..949fe1bd4 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -7,7 +7,7 @@ class ApplicationController < ActionController::Base
                 :authentication_check,
                 :authentication_check_action_token,
                 :config_frontend,
-                :is_role,
+                :role?,
                 :model_create_render,
                 :model_update_render,
                 :model_restory_render,
@@ -215,10 +215,9 @@ class ApplicationController < ActionController::Base
     true
   end
 
-  def is_role( role_name )
+  def role?( role_name )
     return false if !current_user
-    return true if current_user.is_role( role_name )
-    false
+    current_user.role?( role_name )
   end
 
   def ticket_permission(ticket)
@@ -227,12 +226,8 @@ class ApplicationController < ActionController::Base
     false
   end
 
-  def is_not_role( role_name )
-    deny_if_not_role( role_name )
-  end
-
   def deny_if_not_role( role_name )
-    return false if is_role( role_name )
+    return false if role?( role_name )
     response_access_deny
     true
   end
diff --git a/app/controllers/organizations_controller.rb b/app/controllers/organizations_controller.rb
index b51389feb..653812c4c 100644
--- a/app/controllers/organizations_controller.rb
+++ b/app/controllers/organizations_controller.rb
@@ -50,7 +50,7 @@ curl http://localhost/api/v1/organizations.json -v -u #{login}:#{password}
 
     # only allow customer to fetch his own organization
     organizations = []
-    if is_role(Z_ROLENAME_CUSTOMER) && !is_role(Z_ROLENAME_ADMIN) && !is_role(Z_ROLENAME_AGENT)
+    if role?(Z_ROLENAME_CUSTOMER) && !role?(Z_ROLENAME_ADMIN) && !role?(Z_ROLENAME_AGENT)
       if current_user.organization_id
         organizations = Organization.where( id: current_user.organization_id )
       end
@@ -80,7 +80,7 @@ curl http://localhost/api/v1/organizations/#{id}.json -v -u #{login}:#{password}
   def show
 
     # only allow customer to fetch his own organization
-    if is_role(Z_ROLENAME_CUSTOMER) && !is_role(Z_ROLENAME_ADMIN) && !is_role(Z_ROLENAME_AGENT)
+    if role?(Z_ROLENAME_CUSTOMER) && !role?(Z_ROLENAME_ADMIN) && !role?(Z_ROLENAME_AGENT)
       if !current_user.organization_id
         render json: {}
         return
@@ -178,7 +178,7 @@ Test:
   def history
 
     # permissin check
-    if !is_role(Z_ROLENAME_ADMIN) && !is_role(Z_ROLENAME_AGENT)
+    if !role?(Z_ROLENAME_ADMIN) && !role?(Z_ROLENAME_AGENT)
       response_access_deny
       return
     end
diff --git a/app/controllers/search_controller.rb b/app/controllers/search_controller.rb
index fe134da09..0bdd2e340 100644
--- a/app/controllers/search_controller.rb
+++ b/app/controllers/search_controller.rb
@@ -7,7 +7,7 @@ class SearchController < ApplicationController
   def search_user_org
 
     # enable search only for agents and admins
-    if !current_user.is_role(Z_ROLENAME_AGENT) && !current_user.is_role(Z_ROLENAME_ADMIN)
+    if !current_user.role?(Z_ROLENAME_AGENT) && !current_user.role?(Z_ROLENAME_ADMIN)
       response_access_deny
       return true
     end
diff --git a/app/controllers/sessions/collection_base.rb b/app/controllers/sessions/collection_base.rb
index f21a37c6e..f4772bcf7 100644
--- a/app/controllers/sessions/collection_base.rb
+++ b/app/controllers/sessions/collection_base.rb
@@ -26,7 +26,7 @@ module ExtraCollection
     Group.all.each {|item|
       assets = item.assets(assets)
     }
-    if !user.is_role(Z_ROLENAME_CUSTOMER)
+    if !user.role?(Z_ROLENAME_CUSTOMER)
       collections[ Organization.to_app_model ] = []
       Organization.all.each {|item|
         assets = item.assets(assets)
diff --git a/app/controllers/sessions/collection_ticket.rb b/app/controllers/sessions/collection_ticket.rb
index 8135895fe..63a5ea455 100644
--- a/app/controllers/sessions/collection_ticket.rb
+++ b/app/controllers/sessions/collection_ticket.rb
@@ -24,7 +24,7 @@ module ExtraCollection
     Ticket::Article::Sender.all.each {|item|
       assets = item.assets(assets)
     }
-    if !user.is_role(Z_ROLENAME_CUSTOMER)
+    if !user.role?(Z_ROLENAME_CUSTOMER)
 
       # all signatures
       collections[ Signature.to_app_model ] = []
diff --git a/app/controllers/tickets_controller.rb b/app/controllers/tickets_controller.rb
index 5d99d19a0..922ea3277 100644
--- a/app/controllers/tickets_controller.rb
+++ b/app/controllers/tickets_controller.rb
@@ -239,7 +239,7 @@ class TicketsController < ApplicationController
     articles.each {|article|
 
       # ignore internal article if customer is requesting
-      next if article.internal == true && is_role(Z_ROLENAME_CUSTOMER)
+      next if article.internal == true && role?(Z_ROLENAME_CUSTOMER)
 
       # load article ids
       article_ids.push article.id
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index eaf6e269a..ba7601971 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -15,7 +15,7 @@ class UsersController < ApplicationController
   def index
 
     # only allow customer to fetch him self
-    if is_role(Z_ROLENAME_CUSTOMER) && !is_role(Z_ROLENAME_ADMIN) && !is_role('Agent')
+    if role?(Z_ROLENAME_CUSTOMER) && !role?(Z_ROLENAME_ADMIN) && !role?('Agent')
       users = User.where( id: current_user.id )
     else
       users = User.all
@@ -203,17 +203,17 @@ class UsersController < ApplicationController
       user.update_attributes( User.param_cleanup(params) )
 
       # only allow Admin's and Agent's
-      if is_role(Z_ROLENAME_ADMIN) && is_role('Agent') && params[:role_ids]
+      if role?(Z_ROLENAME_ADMIN) && role?('Agent') && params[:role_ids]
         user.role_ids = params[:role_ids]
       end
 
       # only allow Admin's
-      if is_role(Z_ROLENAME_ADMIN) && params[:group_ids]
+      if role?(Z_ROLENAME_ADMIN) && params[:group_ids]
         user.group_ids = params[:group_ids]
       end
 
       # only allow Admin's and Agent's
-      if is_role(Z_ROLENAME_ADMIN) && is_role('Agent') && params[:organization_ids]
+      if role?(Z_ROLENAME_ADMIN) && role?('Agent') && params[:organization_ids]
         user.organization_ids = params[:organization_ids]
       end
 
@@ -260,7 +260,7 @@ class UsersController < ApplicationController
   # @response_message 401               Invalid session.
   def search
 
-    if is_role(Z_ROLENAME_CUSTOMER) && !is_role(Z_ROLENAME_ADMIN) && !is_role('Agent')
+    if role?(Z_ROLENAME_CUSTOMER) && !role?(Z_ROLENAME_ADMIN) && !role?('Agent')
       response_access_deny
       return
     end
@@ -324,7 +324,7 @@ class UsersController < ApplicationController
   def history
 
     # permissin check
-    if !is_role(Z_ROLENAME_ADMIN) && !is_role('Agent')
+    if !role?(Z_ROLENAME_ADMIN) && !role?('Agent')
       response_access_deny
       return
     end
@@ -715,19 +715,19 @@ curl http://localhost/api/v1/users/avatar -v -u #{login}:#{password} -H "Content
   end
 
   def permission_check_by_role
-    return true if is_role(Z_ROLENAME_ADMIN)
-    return true if is_role('Agent')
+    return true if role?(Z_ROLENAME_ADMIN)
+    return true if role?('Agent')
 
     response_access_deny
     false
   end
 
   def permission_check
-    return true if is_role(Z_ROLENAME_ADMIN)
-    return true if is_role('Agent')
+    return true if role?(Z_ROLENAME_ADMIN)
+    return true if role?('Agent')
 
     # allow to update customer by him self
-    return true if is_role(Z_ROLENAME_CUSTOMER) && params[:id].to_i == current_user.id
+    return true if role?(Z_ROLENAME_CUSTOMER) && params[:id].to_i == current_user.id
 
     response_access_deny
     false
diff --git a/app/models/object_manager.rb b/app/models/object_manager.rb
index 5dcbf21dc..44ca47f94 100644
--- a/app/models/object_manager.rb
+++ b/app/models/object_manager.rb
@@ -191,7 +191,7 @@ returns:
           roles_options.each {|role, options|
             if role == '-all-'
               data[:screen][screen] = options
-            elsif user && user.is_role(role)
+            elsif user && user.role?(role)
               data[:screen][screen] = options
             end
           }
diff --git a/app/models/organization/permission.rb b/app/models/organization/permission.rb
index d16f30f62..91d34ccf6 100644
--- a/app/models/organization/permission.rb
+++ b/app/models/organization/permission.rb
@@ -19,7 +19,7 @@ returns
     def permission (data)
 
       # check customer
-      if data[:current_user].is_role('Customer')
+      if data[:current_user].role?('Customer')
 
         # access ok if its own organization
         return false if data[:type] != 'ro'
@@ -31,8 +31,8 @@ returns
       end
 
       # check agent
-      return true if data[:current_user].is_role(Z_ROLENAME_ADMIN)
-      return true if data[:current_user].is_role('Agent')
+      return true if data[:current_user].role?(Z_ROLENAME_ADMIN)
+      return true if data[:current_user].role?('Agent')
       false
     end
   end
diff --git a/app/models/organization/search.rb b/app/models/organization/search.rb
index c8537e8fb..a9ab57261 100644
--- a/app/models/organization/search.rb
+++ b/app/models/organization/search.rb
@@ -27,7 +27,7 @@ returns
       current_user = params[:current_user]
 
       # enable search only for agents and admins
-      return [] if !current_user.is_role('Agent') && !current_user.is_role(Z_ROLENAME_ADMIN)
+      return [] if !current_user.role?('Agent') && !current_user.role?(Z_ROLENAME_ADMIN)
 
       # try search index backend
       if SearchIndexBackend.enabled?
diff --git a/app/models/ticket.rb b/app/models/ticket.rb
index 7096aa143..471b234ec 100644
--- a/app/models/ticket.rb
+++ b/app/models/ticket.rb
@@ -93,7 +93,7 @@ returns
 
   def self.access_condition(user)
     access_condition = []
-    if user.is_role(Z_ROLENAME_AGENT)
+    if user.role?(Z_ROLENAME_AGENT)
       group_ids = Group.select( 'groups.id' ).joins(:users)
                   .where( 'groups_users.user_id = ?', user.id )
                   .where( 'groups.active = ?', true )
diff --git a/app/models/ticket/overviews.rb b/app/models/ticket/overviews.rb
index 0e81ef5ba..a4bfae42f 100644
--- a/app/models/ticket/overviews.rb
+++ b/app/models/ticket/overviews.rb
@@ -19,8 +19,8 @@ returns
   def self.all (data)
 
     # get customer overviews
-    if data[:current_user].is_role('Customer')
-      role = data[:current_user].is_role( 'Customer' )
+    if data[:current_user].role?('Customer')
+      role = Role.find_by( name: 'Customer' )
       if data[:current_user].organization_id && data[:current_user].organization.shared
         overviews = Overview.where( role_id: role.id, active: true )
       else
@@ -30,8 +30,8 @@ returns
     end
 
     # get agent overviews
-    role = data[:current_user].is_role( 'Agent' )
-    return if !role
+    return if !data[:current_user].role?( 'Agent' )
+    role = Role.find_by( name: 'Agent' )
     Overview.where( role_id: role.id, active: true )
   end
 
@@ -112,7 +112,7 @@ returns
 
     #    @tickets = Ticket.where(:group_id => groups, attributes[:myopenassigned] ).limit(params[:limit])
     # get only tickets with permissions
-    if data[:current_user].is_role('Customer')
+    if data[:current_user].role?('Customer')
       group_ids = Group.select( 'groups.id' )
                   .where( 'groups.active = ?', true )
                   .map( &:id )
diff --git a/app/models/ticket/permission.rb b/app/models/ticket/permission.rb
index 1948c81da..1e27ea837 100644
--- a/app/models/ticket/permission.rb
+++ b/app/models/ticket/permission.rb
@@ -18,7 +18,7 @@ returns
   def permission (data)
 
     # check customer
-    if data[:current_user].is_role('Customer')
+    if data[:current_user].role?('Customer')
 
       # access ok if its own ticket
       return true if customer_id == data[:current_user].id
diff --git a/app/models/ticket/search.rb b/app/models/ticket/search.rb
index bbce0eb0e..766baafa3 100644
--- a/app/models/ticket/search.rb
+++ b/app/models/ticket/search.rb
@@ -62,7 +62,7 @@ returns
       query_extention['bool'] = {}
       query_extention['bool']['must'] = []
 
-      if current_user.is_role('Agent')
+      if current_user.role?('Agent')
         groups = Group.joins(:users)
                  .where( 'groups_users.user_id = ?', current_user.id )
                  .where( 'groups.active = ?', true )
diff --git a/app/models/user.rb b/app/models/user.rb
index 9f0e91b58..5a5e9ef86 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -107,7 +107,7 @@ returns
 check if user is in role
 
   user = User.find(123)
-  result = user.is_role('Customer')
+  result = user.role?('Customer')
 
 returns
 
@@ -115,11 +115,15 @@ returns
 
 =end
 
-  def is_role( role_name )
+  def role?( role_name )
+
+    result = false
     roles.each { |role|
-      return role if role.name == role_name
+      next if role.name != role_name
+      result = true
+      break
     }
-    false
+    result
   end
 
 =begin
diff --git a/app/models/user/permission.rb b/app/models/user/permission.rb
index ac8151900..55e1226b2 100644
--- a/app/models/user/permission.rb
+++ b/app/models/user/permission.rb
@@ -19,7 +19,7 @@ returns
     def permission (data)
 
       # check customer
-      if data[:current_user].is_role(Z_ROLENAME_CUSTOMER)
+      if data[:current_user].role?(Z_ROLENAME_CUSTOMER)
 
         # access ok if its own user
         return true if id == data[:current_user].id
@@ -29,8 +29,8 @@ returns
       end
 
       # check agent
-      return true if data[:current_user].is_role(Z_ROLENAME_ADMIN)
-      return true if data[:current_user].is_role('Agent')
+      return true if data[:current_user].role?(Z_ROLENAME_ADMIN)
+      return true if data[:current_user].role?('Agent')
       false
     end
   end
diff --git a/app/models/user/search.rb b/app/models/user/search.rb
index 3e6c8efee..1c470b4b5 100644
--- a/app/models/user/search.rb
+++ b/app/models/user/search.rb
@@ -27,7 +27,7 @@ returns
       current_user = params[:current_user]
 
       # enable search only for agents and admins
-      return [] if !current_user.is_role('Agent') && !current_user.is_role(Z_ROLENAME_ADMIN)
+      return [] if !current_user.role?('Agent') && !current_user.role?(Z_ROLENAME_ADMIN)
 
       # try search index backend
       if SearchIndexBackend.enabled?
diff --git a/lib/sessions/backend/collections/base.rb b/lib/sessions/backend/collections/base.rb
index 89202efd8..3dee887e2 100644
--- a/lib/sessions/backend/collections/base.rb
+++ b/lib/sessions/backend/collections/base.rb
@@ -1,5 +1,5 @@
 class Sessions::Backend::Collections::Base
-  class << self; attr_accessor :model, :is_role, :is_not_role end
+  class << self; attr_accessor :model, :roles, :not_roles end
 
   def initialize( user, client = nil, client_id = nil, ttl )
     @user        = user
@@ -22,19 +22,19 @@ class Sessions::Backend::Collections::Base
   def push
 
     # check role based access
-    if self.class.is_role
+    if self.class.roles
       access = false
-      self.class.is_role.each {|role|
-        next if !@user.is_role(role)
+      self.class.roles.each {|role|
+        next if !@user.role?(role)
         access = true
         break
       }
       return if !access
     end
-    if self.class.is_not_role
+    if self.class.not_roles
       access = false
-      self.class.is_not_role.each {|role|
-        next if @user.is_role(role)
+      self.class.not_roles.each {|role|
+        next if @user.role?(role)
         access = true
         break
       }
@@ -96,18 +96,18 @@ class Sessions::Backend::Collections::Base
     @model = model
   end
 
-  def self.is_role_set(role)
-    if !@is_role
-      @is_role = []
+  def self.roles_add(role)
+    if !@roles
+      @roles = []
     end
-    @is_role.push role
+    @roles.push role
   end
 
-  def self.is_not_role_set(role)
-    if !@is_not_role
-      @is_not_role = []
+  def self.not_roles_add(role)
+    if !@not_roles
+      @not_roles = []
     end
-    @is_not_role.push role
+    @not_roles.push role
   end
 
 end
diff --git a/lib/sessions/backend/collections/email_address.rb b/lib/sessions/backend/collections/email_address.rb
index c1b921dbc..ddb6ec00e 100644
--- a/lib/sessions/backend/collections/email_address.rb
+++ b/lib/sessions/backend/collections/email_address.rb
@@ -1,4 +1,4 @@
 class Sessions::Backend::Collections::EmailAddress < Sessions::Backend::Collections::Base
   model_set 'EmailAddress'
-  is_not_role_set 'Customer'
+  not_roles_add 'Customer'
 end
diff --git a/lib/sessions/backend/collections/organization.rb b/lib/sessions/backend/collections/organization.rb
index 377f129bd..6ead8a5b3 100644
--- a/lib/sessions/backend/collections/organization.rb
+++ b/lib/sessions/backend/collections/organization.rb
@@ -5,7 +5,7 @@ class Sessions::Backend::Collections::Organization < Sessions::Backend::Collecti
 
     # get whole collection
     all = []
-    if !@user.is_role('Customer')
+    if !@user.role?('Customer')
       all = Organization.all
     else
       if @user.organization_id
diff --git a/lib/sessions/backend/collections/signature.rb b/lib/sessions/backend/collections/signature.rb
index 6b00e1556..ef000d200 100644
--- a/lib/sessions/backend/collections/signature.rb
+++ b/lib/sessions/backend/collections/signature.rb
@@ -1,4 +1,4 @@
 class Sessions::Backend::Collections::Signature < Sessions::Backend::Collections::Base
   model_set 'Signature'
-  is_not_role_set 'Customer'
+  not_roles_add 'Customer'
 end