stephenafamo / bob / 28856117809

48%

main: 48%

Build Type

Pull #715

github

Committed by sandonemaki

Commit Message

feat(orm)!: preload child structs with a generated NULL-safe typed mapper

Generate a per-table NULL-tolerant typed mapper (<table>ScanMapperNullable)
for every table that is the target of a to-one relationship, and pass it to
orm.Preload so the joined child columns are scanned without reflection while
preserving the LEFT JOIN semantics of the previous scan.StructMapper path:
an all-NULL row still yields no child object, and NULL values scanned into
non-nullable fields still leave the zero value.

Builds on #715 and benefits from stephenafamo/scan#8.

BREAKING CHANGE: orm.Preload (and the psql/mysql/sqlite Preload wrappers)
gain a new PreloadMapper[T] parameter. Only hand-written callers of
orm.Preload are affected; generated code is regenerated as part of this
change. Pass nil to keep the previous reflection-based behaviour.

Pull Request Pull Request #715: perf(gen): generate typed scan mappers and inject them via the model constructors

Coverage Stats

41 of 56 new or added lines in 10 files covered. (73.21%)

3 existing lines in 3 files now uncovered.

11821 of 24837 relevant lines covered (47.59%)

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