Formula column value not updating in table?

Question

Hi all,
I create the sample for master/detail form. In detail for prdcode,rate,qty,amount is there. When select prdcode it fetching prdcode,rate in a record and if you type the qty the amout will come based on formula(property) :qty*:rate.
It is available on screen. But when i store the data, in backend table the amount is be a null.
What is the problem.
Help me in this regards,
kanish

Answer 1

Hi kanish
Regarding Nul...
-u have to make sure that the formula is working fine and displaying the result in the form screen
-then the item u r storing MUST be a db item >yes and has a column name
-first of all select Help > display_error in the forms runtime may a db item error arais and the record is not correctly saved as u imagined.
u have 2 choices for the solution , i had both before may be it's not very cute but it will work...
1. In when-validate-item Trigger or related item triggers pls follow
SELECT Nvl(( :qty*:rate ) ,0)
INTO :UR_ITEM
FROM DUAL;2.In Pre-Update,Pre-Insert & Pre-Delete Triggers Pls assign the result of ur formula column to the item u want to calc as supposing u r doing the calc of formula in non-db item , then put the following in triggers mentioned ...
: item_name :=:qty*:rate;Hope this helps...
Regards,
Amatu Allah.