diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 8c96d274f..98ac39e96 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -63,6 +63,7 @@ class ApplicationController < ActionController::Base
     @_current_user = User.find( session[:user_id] )
   end
   def current_user_set(user)
+    session[:user_id] = user.id
     @_current_user = user
     set_user
   end
@@ -262,6 +263,9 @@ class ApplicationController < ActionController::Base
       # save object
       generic_object.save!
 
+      # set relations
+      generic_object.param_set_associations( params )
+
       model_create_render_item(generic_object)
     rescue Exception => e
       puts e.message.inspect
@@ -282,7 +286,11 @@ class ApplicationController < ActionController::Base
 
       # save object
       generic_object.update_attributes!( object.param_cleanup( params[object.to_app_model_url] ) )
-      model_update_render_item(generic_object)
+
+      # set relations
+      generic_object.param_set_associations( params )
+
+      model_update_render_item( generic_object )
     rescue Exception => e
       logger.error e.message
       logger.error e.backtrace.inspect
diff --git a/app/models/application_model.rb b/app/models/application_model.rb
index 42f692a93..8b8b82018 100644
--- a/app/models/application_model.rb
+++ b/app/models/application_model.rb
@@ -73,6 +73,33 @@ returns
 
 =begin
 
+set rellations of model based on params
+
+  result = Model.param_set_associations(params)
+
+returns
+
+  result = true|false
+
+=end
+
+  def param_set_associations(params)
+
+    # set relations
+    self.class.reflect_on_all_associations.map { |assoc|
+      real_key = assoc.name.to_s[0,assoc.name.to_s.length-1] + '_ids'
+      if params.has_key?( real_key.to_sym )
+        list = []
+        params[ real_key.to_sym ].each {|item|
+          list.push( assoc.klass.find(item) )
+        }
+        self.send( assoc.name.to_s + '=', list )
+      end
+    }
+  end
+
+=begin
+
 remove all not used params of object (per default :updated_at, :created_at, :updated_by_id and :created_by_id)
 
   result = Model.param_validation(params)