Only add data with ref table

hy guys,
i want to ask for my problem
i build data like this (in table project)
image
and this my view


I want to make when the user adds data (in another table / table “qrcode”) then the data added is no more than the data written in the project table

max only like in project

i use this formula, but its not work

if ( 
ANY(SELECT(project[unit], (ISNOTBLANK("project[idproject]"))))
<= 
COUNT( SELECT( QR CODE[keterangan], ([idproject] = [idproject]))),
ADDS_ONLY,
READ_ONLY
)

can you help me?

Meaning you want to prevent duplicate data? Or you want each user to be able to add only one row ever?

1 Like

i want to when user add data in table qrcode
data to add following ref table from unit in project

when count data in qr code is full data can’t add