Hi guys,

any advise?

Thanks.

Jaime

Below is one possible approach:

1. Add UserName text field to subtable ´Planes Suscritos´.

2. Add UserName := userName() to "Trigger on create" of subtable

3. Add button to parent Suscripciones table with code:

let u := userName();
let s := (select 'Planes Suscritos')[UserName = u];
let c := cnt(s);
alert(c)

That should return the count of the current username in the subtable. Use that count to create a script that limits the user to only creating one record. I do not have time to test this right now, but I hope it helps.

userId() might be better than userName() in case user changes name.

Another approach, button for table Suscripciones:

---

let t := this;
let c := cnt(select ´Planes Suscritos´ where Relationship_Name = t);
if c = 0 then
let n := (create ´Planes Suscritos´);
n.(Relationship_Name := t)
else
alert("Hold your horses, there is " + c + " record already")
end