Nested Data Problem

Hi All! I have a really simple problem that unfortunately I can't solve. When I create a new document to fill, I want that for that when I select the drop-down “Cliente”  in the reference selector “Impianti” I can open only the Objects Impianti directly associated to the Object Cliente. Here the part of domain model I draw:   And here what I have to fill : Currently when I select the “client” I can chose all “Impianti” I have in the database and not only the correctly associated. I link the “Impianti” to “Cliente” with a page where I create the Object “Impianti”.   Thanks in advance for any help!    
1 answers

In your reference selector go to "Selectable object" and then available "Constrained by" paths. You are sure to see the path you need.