Settin' default value of a lov depending on the value of another lov

Question

hi all,
here is my problem:
I got two combobox item in my form;
the first one is customer_id,
the second one is seller_id,
what i wanna do is:
when selecting one customer_id, i want to set the value of the seller_id to the one associated with this customer, and give the enduser to change this value;
i'm tryin' to do so with bind variables but it doesn't work!
any help.;
thanks in advance

Answer 1

Hi,
ok got your requirement clear ,see what all you have to
First of I make clear that by frame what I ment was that when you are in the design phase of the
and you are in the section of "formating " ,there you have 2 frames which are basically not visible as frames,
so just forget about that.
I have implemented the same thing in the emp table intead of your
your customer_id and the supplier_id.
I'm assuming that you will be having just one record in the second LOV corresponding to the
first LOV.
What I've done is that I have made an entry in the scott.emp table with deptno 40 so that
for deptno 40 I have just 1 entry ,to simulate your case.
Note:
Customer_id type is combobox the lov is LOV_CUSTUMER (this will be equivalent to my DEPT_NO LOV)
seller_id type is combobox too, the lov is LOV_SELLER (this will be equivalent to my EMPNO_NO LOV)
1)My driving LOV is in deptno field.
2)I have the driven LOV in empno field.
3)Now when I select Operation dept (dept no 40),I get the selected value in the LOV (empno)
and also rest of the empnos.
This is how you can achieve the functionality as said by you.
1)In your second LOV write some thing similar.
select ENAME, EMPNO from SCOTT.EMP where deptno = :deptno
union
select ENAME, EMPNO from SCOTT.EMP where deptno != :deptno
this is to ensure that you get all the values and at the same time
are able to use the binding of the second LOV.
2)In the before display section write something similar.
declare
l_empNo varchar2(3000);
l_deptNo number(4);
begin
-- This deptno shows what you selected from the first LOV.
l_deptNo := p_session.get_value_as_NUMBER(
p_block_name => 'DEFAULT',
p_attribute_name => 'A_DEPTNO',
p_index => 1);
--just check  wheather it returned something,at the time of loading it will not return anything,so simply
--return in that case without doing anything.
if(l_deptNo is null) then
return;
else
--This query basically fetches the value for your second LOV.
select empno into l_empNo from scott.emp where deptno = l_deptNo;
--set the value for the second LOV in the session.
p_session.set_value(
p_block_name => 'DEFAULT',
p_attribute_name => 'A_EMPNO',
p_value => to_number(l_empNo));
end if;
end;
please try to understand the relationship in my scenario and your scenario.
Hope this helps.
rahul