I apologize if it is a topic already covered, but I cannot find the solution to this problem.
When filling out an order, the agent must fill in PRODUCT [QUANTITY] by entering the total kg sold. I would like this quantity entered to be valid only if it is a multiple of the number entered in PRODUCTS FORMAT [FORMAT].
example:
PRODUCT [QUANTITY] = 100
PRODUCTS FORMAT [FORMAT]= 25
quantity is valid
PRODUCT [QUANTITY] = 90
PRODUCTS FORMAT [FORMAT]= 25
quantity is not valid
these are my current tables:
RIGHE_ORDINI table is a child of ORDINI table (all theese table are linked with ref field)
how should i fill the “vaid if” RIGHE_ORDINI[QUANTITY]?


