COMMIT_FOARM IS NOT WORKING INSIDE THE WHEN-MOUSE-CLICK

Question

Dear friends
I have following script in when-mouse-click trigger
BEGIN
IF NOT Form_Success THEN
Bell;
RAISE Form_Trigger_Failure;
END IF;
IF :System.Form_Status = 'CHANGED' THEN
IF :LOCK_FLAG = 1 THEN
UPDATE PROJ.IM_REQUEST_HEADER
     SET LOCK_FLAG = 1
     WHERE DOC_CODE = :DOC_CODE ;
     SHOW_MESSAGE('DOCUMENT CODE -1'|| ' '||:DOC_CODE);
     SHOW_MESSAGE('LOCK FLAG -1'|| ' '||:LOCK_FLAG);
     Commit_Form;
     MESSAGE('The Record have been changed -1 ');
ELSE
     UPDATE PROJ.IM_REQUEST_HEADER
     SET LOCK_FLAG = 0
     WHERE DOC_CODE = :DOC_CODE ;
     Commit_Form;
     MESSAGE('The Record have been changed - 2');
END IF;
ELSIF :System.Form_Status <> 'QUERY' THEN
Message('An error prevented your changes from being
committed.');
Bell;
RAISE Form_Trigger_Failure;
END IF;
END;
Note :
The above trigger is attached to this field LOCK_FLAG and the item type of LOCK_FLAG is check box in the form and the property of the LOCK_FLAG
is site as the following :
database item = NO , and the property of the blcok IM_REQUEST_HEADER is site as the following :
database data block = NO
and my problem is when i change the value of LOCK_FLAG is not executting the update statement .
waiting for your valuable answer in details thank in advance for your cooperation.
best regards
jamil alshaibani

Answer 1

Dear Wilfred
Thank you very much for your cooperation, yes when I change the “Database data block “ property to no, it works, as I wanted to be.
Notes about my application:
In my program I provide the store keeper query screen, he can check the orders and lock the specific order by clicking on the LOCK_FLAG field, so after he locked the field the requester user can not change his order content if it is locked by the store keeper
And the way I was trying to do it ,by query the data from      IM_REQUEST_HEADER Table which is the Order table which is the header table ,the form is displaying doc_code ,doc_date ,lock_flag,and the order store name ,and I provide him a report on the same form that he can see the details of the order items ,and all the field properties set to no, that is update allowed to no ,insert allowed set to no, but the field lock_flag property set as update allowed to yes and insert allowed set to yes
and I would like to now how it was displaying this message
ORA-01400 cannot insert NULL INTO “PROJ”.IM_REQUEST_HEADER”.DOC_CODE
And I was not inserting, I was just updating the lock_flag by the above update statement.
Best regards
Jamil Alshaibani