Purpose:
Application for describing the procedure to report an attribute error message for multiple fields in the given context element
Scenario:
I would like to explain the functionality of how to report an attribute error message for multiple fields during validations.
Usually, we report attribute error message per attribute but for the requirement to show single attribute error message for many input fields cannot be achieved by using REPORT_ATTRIBUTE_ERROR_MESSAGE( ) method, this document guides through the process of achieving the requirement by using method REPORT_ELEMENT_ERROR_MESSAGE( )
Pre-requisite:
Basic knowledge of Webdynpro ABAP,& OO ABAP
Step by step Process
Step1:
Go to t-code SE80, and create web dynpro component with a view V_MAIN & window W_MAIN as below
Step2:
Go to the context tab of view V_MAIN and create a node INPUT with attributes as shown below
Note: I have chosen the attributes from table PA0001 - for demo purpose
Step3:
Now, we need to create form container with input fields.
Go to layout tab of view V_MAIN and right click on ROOTUIELEMENTCONTAINER as below
Step 4:
Choose context node INPUT and check the "Create Form in New Container" and also choose all attributes and click on "OK" as shown below
Step 5:
Create a button and assign an action for the event OnAction as shown below
Step 5.1:
Now, go to WDDOBEFOREACTION( ) method of view V_MAIN and write the below code
| WDDOBEFOREACTION( ) |
|---|
METHOD wddobeforeaction . DATA lo_api_controller TYPE REF TO if_wd_view_controller. DATA lo_action TYPE REF TO if_wd_action. DATA lo_message_manager TYPE REF TO if_wd_message_manager. DATA lt_attributes TYPE string_table. DATA lo_nd_input TYPE REF TO if_wd_context_node. DATA lo_el_input TYPE REF TO if_wd_context_element. DATA ls_input TYPE wd_this->element_input.
lo_api_controller = wd_this->wd_get_api( ). lo_action = lo_api_controller->get_current_action( ).
IF lo_action IS BOUND. CASE lo_action->name. WHEN 'CHECK_DATA'. "----------------------------------- "Read data from context
lo_nd_input = wd_context->get_child_node( name = wd_this->wdctx_input ).
"get element via lead selection lo_el_input = lo_nd_input->get_element( ).
"get all declared attributes lo_el_input->get_static_attributes( IMPORTING static_attributes = ls_input ).
"----------------------------------- "----------------------------------- " this method returns the attributes for " which the data is not filled
lt_attributes = check_attriubutes( ls_input ).
" if no attributes found for errors, return the control IF lt_attributes[] IS INITIAL. RETURN. ENDIF.
CALL METHOD lo_api_controller->get_message_manager RECEIVING message_manager = lo_message_manager.
" report message
CALL METHOD lo_message_manager->report_element_error_message EXPORTING message_text = 'Please fill all the fields' element = lo_el_input attributes = lt_attributes. ENDCASE. ENDIF. ENDMETHOD. |
Create a method CHECK_ATTRIBUTES( ) in view for checking attributes whether the fields are filled and writ the below code
Note: this method gets input structure and check for a field for value and it collects all the empty fields for error message display
Parameters:
| CHECK_ATTRIBUTES( ) |
|---|
METHOD check_attriubutes . DATA lo_strdescr TYPE REF TO cl_abap_structdescr. DATA lt_components TYPE cl_abap_structdescr=>component_table. DATA ls_components LIKE LINE OF lt_components.
FIELD-SYMBOLS: <lv_value> TYPE any.
lo_strdescr ?= cl_abap_structdescr=>describe_by_data( is_input ).
"return if no input str passed IF lo_strdescr IS NOT BOUND. RETURN. ENDIF.
lt_components = lo_strdescr->get_components( ).
LOOP AT lt_components INTO ls_components.
ASSIGN COMPONENT ls_components-name OF STRUCTURE is_input TO <lv_value>.
"collect attributes if not filled
IF <lv_value> IS ASSIGNED AND <lv_value> IS INITIAL. APPEND ls_components-name TO rt_attributes. ENDIF. ENDLOOP.
ENDMETHOD. |
Now, activate the component
Step 6:
Create web dynpro application as shown below
Output:
Initial output screen looks as below
When user presses button CHECK_DATA, only 1 attribute error message is shown for all input fields as below
Now, user fills Personnel No, End date & start date and presses the button check data again, the output looks as below
Hope this helps those looking for reporting one attribute error message for many input fields.
Your valuable feedback /suggestions/comments are always welcome 