Chack and highlight mandatory field

[Former Member]

Hello Webdynpro experts!

We have a Web Dynpro application consisting of several views (V_MAIN, V_GENERATE, V_GENERATE_2).

The V_MAIN view contain a send button, and V_GENERATE_2 view contains some required fields.

We would like to check and highlight the required fields from V_GENERATE_2 when the user push the send button from the view V_MAIN.

Within Component controller we detected method CHECK_REQUIRED that checks the content of view V_GENERATE_2:

if ls_cc_req_context-REQ_CATEGORY = 'X' and ls_nd_add_context-CATEGORY is INITIAL.
       lv_msg = WD_ASSIST->IF_WD_COMPONENT_ASSISTANCE~GET_TEXT( 'E15' ).
       CALL METHOD lo_message_manager->REPORT_ATTRIBUTE_ERROR_MESSAGE
         EXPORTING
MESSAGE_TEXT = lv_msg
ELEMENT = lo_el_nd_add_context
ATTRIBUTE_NAME = 'CATEGORY'

endif.

Unfortunately this check does not check whether or not the required fields are empty.

We have heared about the the method cl_wd_dynamic_tool=>check_mandatory_attr_on_view, unfortunately we do not know how ans where (view) it should be declared.

Can some one help to solve this problem?

[former_member185241]

Hey Alex,

Code to Check mandatory fields in view is following...

It will display en error when any mandatory field is left as blank.

-> Go to method check_mandatory_attr_on_view of class cl_wd_dynamic_tool and check the type of exporting parameter MESSAGE , in your code declare an internal table of same time.

Write this logic to click action of button( Send )

method ONACTIONCLICK .

* Data declaration

data:

lo_view_controller type ref to if_wd_view_controller,

lo_dyn type ref to cl_wd_dynamic_tool.

* Create Object

create object lo_dyn.

data lt_messages type lo_dyn->t_check_result_message_tab.

* Get view controller reference

lo_view_controller = wd_this->wd_get_api( ).

* Call Method to verify the element has the value or not

call method cl_wd_dynamic_tool=>check_mandatory_attr_on_view

exporting

view_controller = lo_view_controller

display_messages = ABAP_TRUE

importing

messages = lt_messages .

endmethod.

[amy_king]

Hi Alex,

Class CL_WD_DYNAMIC_TOOL has two methods that might be of use to you.

• CHECK_MANDATORY_ATTRIBUTES
  • Requires you to provide an explicit list of attributes which you consider to be mandatory. If any of the named attributes are initial, the method indicates an error. This method is useful if you want to specify the list of attributes yourself or if you want to validate from the componentcontroller instead of from a view.
• CHECK_MANDATORY_ATTR_ON_VIEW
  • Requires you to specify the view controller whose attributes should be checked. The method looks at the required property of each of the view's UI elements and indicates an error if any are initial. Because you must specify the view controller, this method must be called from a view.

You can get a reference to a view's controller by using the following statement in any of the view's methods, e.g., WDDOBEFOREACTION.

  DATA lo_view_controller TYPE REF TO if_wd_view_controller,
  lo_view_controller ?= wd_this->wd_get_api( ).

Cheers,

Amy

[Former Member]

Hello Amy,

many thanks!

and how can I check the attributes of the other view?

Is it also possible instead to adapt the existing method CHECK_REQUIRED that checks the content of view V_GENERATE_2?

if ls_cc_req_context-REQ_CATEGORY = 'X' and ls_nd_add_context-CATEGORY is INITIAL.
       lv_msg = WD_ASSIST->IF_WD_COMPONENT_ASSISTANCE~GET_TEXT( 'E15' ).
       CALL METHOD lo_message_manager->REPORT_ATTRIBUTE_ERROR_MESSAGE
         EXPORTING
MESSAGE_TEXT = lv_msg
ELEMENT = lo_el_nd_add_context
ATTRIBUTE_NAME = 'CATEGORY'

endif.

Thank you!

[amy_king]

Hi Alex,

Your approach will depend on whether you defined the views' context nodes locally within the views themselves  or defined the context nodes in the componentcontroller and then mapped the context nodes to the views. Here is one possible approach...

If you defined the context nodes in the componentcontroller (say node A and node B) and mapped the context nodes to the views (say node A is mapped to V_GENERATE and node B is mapped to V_GENERATE_2) when the user clicks the send button on V_MAIN, you could call a componentcontroller method to check the fields of both V_GENERATE and V_GENERATE_2 since the componentcontroller has access to both nodes A and B. In this example, the componentcontroller method would use CHECK_MANDATORY_ATTRIBUTES.

Cheers,

Amy

[Former Member]

Hello,

I added the following code to the existing method WDDOBEFOREACTION

method _OVR_00O2TQKOM7ZWZBCIDL5IOQDYN .
     data lo_api_controller type ref to if_wd_view_controller.
     data lo_action         type ref to if_wd_action.
      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 'SEND_MESSAGE'.
           CALL METHOD cl_wd_dynamic_tool=>check_mandatory_attr_on_view
           EXPORTING
             view_controller = lo_api_controller.
             WD_COMP_CONTROLLER->CHECK_REQUIRED( ).
             WD_COMP_CONTROLLER->CHECK_CUST_REQUIRED( ).
       endcase.
     endif.
endmethod.

Unfortunately this does not give any error for my mandatory field.

When I add  display_messages = abap_true I get the error that display_messages is unknown.

It seams that I miss the DATA command.

I need some clarification please.

Thank you!

[Former Member]

l_has_errors the return value for method 'check_mandatory_attributes' implies whether all the mandatory fields are entered.

        DATA: attr_list TYPE  STRING_TABLE.

     data lt_messages type lo_dyn->t_check_result_message_tab.

    DATA:

         l_attr_list type CL_WD_DYNAMIC_TOOL=>t_check_mandattr_tab,

         l_attr type CL_WD_DYNAMIC_TOOL=>t_check_mandattr_struct,

         l_has_errors type wdy_boolean.

    CALL METHOD cl_wd_dynamic_tool=>check_mandatory_attr_on_view

     EXPORTING

       view_controller  = l_view_controller

       display_messages = ABAP_false

     IMPORTING

       messages         = lt_messages.

       l_has_errors = cl_wd_dynamic_tool=>check_mandatory_attributes(

                               attribute_list   = l_attr_list

                               display_messages = abap_FALSE

                               context_root     = wd_context

         ).

     if l_has_errors = 'X'.

          "display the error message

     endif.

     Also lt_messages returns messages. I have used it to display the appropriate message with the fields details.

DATA : first_msg TYPE string VALUE 'Please enter the mandatory fields'.

data : secon_msg TYPE string.

FIELD-SYMBOLS: <lw_msg> LIKE LINE OF lt_messages.

LOOp at lt_messages ASSIGNING <lw_msg>.

      CALL METHOD <lw_msg>-context_element->get_node

      RECEIVING

        node = lo_node.

    CALL METHOD lo_node->get_node_info

      RECEIVING

        node_info = lo_node_info.

    CALL METHOD lo_node_info->get_attribute

      EXPORTING

        name           = <lw_msg>-attribute_name

      RECEIVING

        attribute_info = lw_attr_info.

APPEND <lw_msg>-attribute_name to attr_list.

CONCATENATE secon_msg <lw_msg>-attribute_name INTO secon_msg separated by ' ' .

ENDLOOP.

CONCATENATE first_msg secon_msg into  first_msg.


lo_api_controller ?= wd_this->wd_get_api( ).



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              = first_msg

          element                   = lo_el_context

          attributes                = attr_list

          .