Is there a way to make a multiple attribute mandatory in the BDM?

I need to make an multiple attribute in the BDM mandatory, for example, let's say I have a BusinessObject Invoice, an invoice contains multiple InvoceLine, and an invoice should not exist without at least one InvocieLine, how can I achieve this with the BDM?

Hi,

It is not possible to achieve this constraint at BDM (database) level with Bonita.
But it can be achieved using a contract constraints when creating your invoice list or updating it.

HTH
Romain