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Luiz K Matsumura
dfc4ef37d0
The Server and SharedServer models each declared a relationship named
'servers' that actually pointed at the parent ServerGroup, with backrefs
('server'/'sharedserver') providing the collections. The naming was the
inverse of what it modelled and made the call sites read oddly.
Redefine the relationships in the natural direction using explicit
back_populates: ServerGroup gains 'servers' and 'sharedservers'
collections (carrying the existing delete-orphan cascade), and Server and
SharedServer each gain a 'servergroup' reference. The two call sites that
read the group name are updated from server.servers.name to
server.servergroup.name accordingly.
This is a naming/modelling cleanup with no functional or schema change, so
no migration is required.