v0.50.0

Added

• Generated dberrors packages now include generic and per-table check-constraint errors for PostgreSQL, matched by constraint name for pq and pgx drivers. (thanks @keithbro-imx)

Changed

• PostgreSQL single-column slice relationship loaders (<Parent>Slice.<Rel>) and batch counts (<Parent>Slice.LoadCount<Rel>) now de-duplicate the key array bound to = ANY($1) when the key column can contain duplicates (a non-unique foreign key). The array is only a semi-join filter, so query results are unchanged — a slice of 10,000 parents sharing 50 related rows now binds 50 keys instead of 10,000. Keys that are unique by construction (the parent's own primary key or a uniquely-constrained column) and key types not comparable with == keep the previous plain loop, decided at codegen time (#740). (thanks @sandonemaki)
• Generated through-relationship loaders (Load<Rel>) no longer apply every query mod twice (once against a throwaway query to detect whether the user set columns, then again for real). The default columns are now added by a deferred bob.ModFunc during the single real application — the same pattern View.Query uses — and the join-key slice is pre-allocated to the parent slice length. Generated SQL is unchanged (#740). (thanks @sandonemaki)

Fixed

• Fixed the PostgreSQL code generator's query parser renumbering each reference to a repeated query parameter ($N) as a distinct argument (e.g. id = $1 OR parent_id = $1 generating $1/$2), which changed the meaning of the generated query mods. Repeated $N references now map to a single generated parameter (#745). (thanks @dmakushin)

New Contributors

• @dmakushin made their first contribution in #745
• @keithbro-imx made their first contribution in #717

Full Changelog: v0.49.0...v0.50.0