Field Available in result, not in search

Question

Hi,
In my requirement, there is a field available in result, but not in search criteria.
Hence:
1. I appended the Zfield in the BOL structure of the search.
2. Got the DDLB value in GET_V_ZFIELD.
3. Displayed the field in config.
4. Wrote the following code in EH_ONSEARCH.
But it did not give the result with the ZFIELD search criteria, rather results all types. I checked in dquery_definition, the search parameter/criteria is available. Please suggest how to proceed.
method eh_onsearch.
  data: lr_query_service    type ref to cl_crm_bol_dquery_service.
  data: lr_qs         type ref to cl_crm_bol_dquery_service,
        lr_col_params type ref to if_bol_bo_col,
        lr_entity     type ref to if_bol_bo_property_access,
        lr_qs_col type ref to if_bol_bo_col,
        lr_attr   type ref to if_bol_bo_property_access,
        ls_attribute type genilt_selection_parameter,
        lv_low type string.
  field-symbols:<fs_result> type crms_thtmlb_search_field_info,
                <ft_ddlb> type  crmt_thtmlb_search_ddlb_nvp.
  lr_qs ?= me->typed_context->XXXXX->collection_wrapper->get_current( ).
  if lr_qs is bound.
    lr_col_params = lr_qs->get_selection_params( ).
  endif.
  if lr_col_params is bound.
    lr_entity = lr_col_params->get_first( ).
    while  lr_entity is bound.
    call method lr_entity->get_properties
      importing
        es_attributes = ls_attribute.
    if ls_attribute-attr_name = 'ZFIELD.
      lv_low = ls_attribute-low.
   if lr_window is bound and lr_window->gv_vr_set = abap_false.
    if lv_low is not initial.
      lr_qs->add_selection_param(
                                 iv_attr_name = 'ZFIELD'
                                 iv_sign      = 'I'
                                 iv_option    = 'NE'
                                 iv_low       =  lv_low ).
      super->eh_onsearch( htmlb_event = htmlb_event
                          htmlb_event_ex = htmlb_event_ex ).
    endif.
    endif.
*Remove the just added entity from search parameter list so that it does not appear on UI.
      try.
          if lr_entity->get_property_as_string( iv_attr_name = 'ATTR_NAME' )  eq 'ZFIELD' . "#EC NOTEXT
            if lr_entity->get_property_as_string( iv_attr_name = 'LOW') eq lv_low. "#EC NOTEXT
              lr_col_params->remove( lr_entity ).
              exit.
            endif.
          endif.
        catch cx_sy_conversion_error cx_root .
      endtry.
      lr_entity = lr_col_params->get_next( ).
    endwhile.
  endif.
*Build the Parameter table again.
  me->typed_context->XXXX->build_parameter_tab( ).
endmethod.

Answer 1

Please check this blog; the necessary steps are explained in detail.
/people/tuncer.gorgun3/blog/2010/06/21/enhancing-standard-activity-bol-query-with-related-fields
Regards
Kathirvel