How to access attributes of one model class from some other model

Hello,

to put an instance of the model-class to your controller is a very common way and described in the SAP Standard Examples:

Create a model in the do_init and set it to an attribute (here called 'model' which has a reference to your model class:

me->model ?= me->create_model( class_name = 'ZCL_MODEL_CLASS'
                                 model_id   = 'myownmodel' ).

In the do_request of your main controller you set it to your view as page attribute:

* datadeclaration
  DATA: li_content TYPE REF TO if_bsp_page.

* output current view (create, set attibutes, and call)
  li_content = create_view( view_name = 'main.htm' ).

* set attribute model if needed
  li_content->set_attribute( name = 'model' value = model ).

* call master views
  call_view( li_content ).

In a sub controller you first get the model from the main controller in the do_init and set it then to an own attribute:

* create reference to parent controller class
  DATA: lr_my_parent TYPE REF TO zcl_main_controller.

* get main controller from attribute
  lr_my_parent ?= me->m_parent.

  set_model( model_instance = lr_my_parent->model
                   model_id = 'myownmodel' ).

  me->model = lr_my_parent->model.

In do_request you pass it your view (see above).

Regards, Bernd