Question : Oracle Forms : How to populate checkboxes dynamically from the database

Hello,

I need to populate checkboxes in the Oracle Forms from the database. I have database table structure as follows:

PEOPLE ( PEOPLEID,FNAME,LNAME)
insert into PEOPLE(PEOPLEID,FNAME,LNAME) VALUES(11111, 'ANDY', 'ADAMS');
insert into PEOPLE(PEOPLEID,FNAME,LNAME) VALUES(22222, 'BRIAN', 'BANK');
insert into PEOPLE(PEOPLEID,FNAME,LNAME) VALUES(33333, 'CAROL', 'CAMPS');

PEOPLE_INTERESTS(PEOPLEID,INTERESTID)

insert into PEOPLE_INTERESTS(PEOPLEID,INTERESTID) VALUES(11111,'AAA');
insert into PEOPLE_INTERESTS(PEOPLEID,INTERESTID) VALUES(11111,'CCC');
insert into PEOPLE_INTERESTS(PEOPLEID,INTERESTID) VALUES(33333,'CCC');
insert into PEOPLE_INTERESTS(PEOPLEID,INTERESTID) VALUES(33333,'BBB');

"INTERESTS_TYPE (INTERESTID,INTERESTSTYPE)
insert into INTERESTS_TYPE(INTERESTID,INTERESTS) VALUES('AAA', 'AGRICULTURE');
insert into INTERESTS_TYPE(INTERESTID,INTERESTS) VALUES('BBB', 'BOOKS');
insert into INTERESTS_TYPE(INTERESTID,INTERESTS) VALUES('CCC', 'COMPUTER');
insert into INTERESTS_TYPE(INTERESTID,INTERESTS) VALUES('DDD', 'FINANCE');

I would like to show these 4 checkboxes on the form. In the form, when user search for 'ANDY ADAMS', the out of four checkboxes,''AGRICULTURE'' and 'COMPUTER' checkboxes should be checked. User should be allow to edit these checkboxes. When creating new records, these 4 checkboxes should be avaliable to user.

I will really appreciate if if anybody could give me some ideas on how to achieve this. I am new to forms, my knowledge of forms is very limited.

Thanks,

Answer : Oracle Forms : How to populate checkboxes dynamically from the database

For this sort of behaviour with a limited but possible changing number of possibilities I would choose the following approach, that requires just a few changes from default behaviour of oracle forms.
Create a temporary table
create global temporary table cartesian_check
((PEOPLEID  (same type as other),
interest_id (same type as other),
INTERESTS (same type as other),
checked varchar2(1))
ON COMMIT PRESERVE ROWS;

define the child block on the temporary table and mark it as only updateble ;
only the columns interests and checked have to visible , and only checked is updateble
in the pre-quiry trigger of the child block
    delete from cartesian_check;
    insert into cartesian_check
      select :masterblock.people_id, interest_id, INTERESTS,
      (select decode(count(*),0,'N','Y')
     from people_interest PI
     where PI people_id = :master.people_id
     and PI.interest_id =  it.inertestid) checked
     from interests_type IT;

in the  on_update trigger
    if checked = 'N'  then
        delete from   people_interest PI
        where PI people_id = :people_id
       and PI.interest_id = :interest_id;
   end if;
    if checked = 'Y'  then
      insert into  interests_type IT
      select  :people_id,  :interest_id
      from dual
      -- prevent changing from Y to N to Y from inserting a second record
      WHERE NOT EXISTS (SELECT 1
                                         FROM  people_interest PI
                                         where PI people_id = :people_id
                                         and PI.interest_id = :interest_id)
    end if;