This was the change from my first demo, which had `path_ids` and was not intuitive.  Israel/Tel Aviv/Rack7 showed 35 hosts, but Israel/Tel Aviv only showed 26 hosts.  Now, it's opposite. Israel/Tel Aviv shows all 35 hosts and Israel/Tel Aviv/Rack7 shows 9 hosts that only are assigned to Rack 7.   Hosts are unique since they are the only object that belongs_to one location or organization.