When id column has no autoincrement flag query for lastInsertId fails
on postgres because no value has been generated. Call lastInsertId only
if id is null.
Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>
This allows elegant upserts where the entity ID is provided (e.g. by an
external system) and when that data is fed into our database multiple
times.
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
