Dynamcally hiding an assignment block

The UI config utility  allows us to assign assignment blocks to a overview page depending on the user role, object type, component usage name etc., But, there may be cases where we would like to hide the assignment blocks based on some validations during run time. This wiki will show you how to do it.

Step 1 - Identify the name of the assignment block
      Go to the run time repository of the component. Note down the component usage name. Note down the interface view name. Now, the name of the assignment block page will be

'component_usage_name'.'interface_view_name'.   (concatenate both separated by '.' )

Step 2 - Overview page coding
Detaching Views
    In the overview page controller, redefine the method 'DETACH_STATIC_OVW_VIEWS'. This method will be called during each page refresh and will return views to be removed from the overview page.

DATA: ls_viewid TYPE bsp_dlc_ovw_stat_view_attach.
  CONSTANTS: c_view_id TYPE string VALUE 'CUBTOrgSet.BTORGSET/OrgSet'.
*do validations
*if validation fails    
ls_viewid-viewid = c_view_id.
APPEND ls_viewid TO rt_viewid.
*endif

Reattaching  Views
    In the same overview page controller, redefine the method 'REATTACH_STATIC_OVW_VIEWS'.

*basically the same code as in detach views. The return table carries the views to be reattached
*Make sure that the views are not attached already
 DATA: ls_viewid TYPE bsp_dlc_ovw_stat_view_attach.
  CONSTANTS: c_view_id TYPE string VALUE 'CUBTOrgSet.BTORGSET/OrgSet'. *if validation ok
  READ TABLE view_area WITH KEY appl_viewname = c_view_id
                                        type          = space
                                        traymode      = abap_undefined
                                        transporting no fields.
 if sy-subrc = 0.
     ls_viewid-viewid = c_view_id.
    APPEND ls_viewid TO rt_return.
endif.