How do I validate multiple records held in the form?

Question

I have a form containing a list of records from a base table.
The records consist of 2 columns, a from and to value. The
records must specify ranges and those ranges must be in order
and not overlap. I.e. 1...2, 5...9 NOT 1...4, 3...6. How can I
ensure this is the case before the user commits any changes to
the database?
A When-Validate... trigger doesn't allow me to use built-ins
like GO-ITEM etc which would allow me to do this. Also these
triggers will only look at the current record, not the previous
or next record.
Any ideas?
null

Answer 1

Steve West (guest) wrote:
: I have a form containing a list of records from a base table.
: The records consist of 2 columns, a from and to value. The
: records must specify ranges and those ranges must be in order
: and not overlap. I.e. 1...2, 5...9 NOT 1...4, 3...6. How can
I
: ensure this is the case before the user commits any changes to
: the database?
: A When-Validate... trigger doesn't allow me to use built-ins
: like GO-ITEM etc which would allow me to do this. Also these
: triggers will only look at the current record, not the previous
: or next record.
: Any ideas?
Hi,
There is another way to validate each record as and when it is
created. Create a parameter P1 and created a
WHEN-VALIDATE-RECORD trigger at block level.. The code I used to
verify the requirement is follows. Here Col1 is From and Col2 is
To. You can add more functionalities to it.
WHEN-VALIDATE-RECORD
if :col2 is null or (:col2 <= :col1) then
message(' The numbers should be in order');
raise form_trigger_failure;
end if;
if :parameter.p1 is null then
:parameter.p1 := :col2;
else
if :col1 != :parameter.p1 + 1 then
message(' The numbers should be in sequence');
raise form_trigger_failure;
end if;
:parameter.p1 := :col2 ;
end if;
Hope this will help.
null