Jonathan Bernard
2301da8143
Add a PostgreSQL-specific getRecordForUpdate helper that appends FOR
UPDATE to the generated SELECT statement so callers can lock a row
inside an explicit transaction.
generateProcsForModels now always emits a direct-connection
get<RecordName>ForUpdate proc that accepts db_postgres.DbConn. There is
intentionally no dbType overload for this API, because reacquiring a
connection via withConnection would defeat the lock's transactional
scope.
The source docs and README now document the new helper and show the
intended usage pattern inside inTransaction:
db.inTransaction:
var item = conn.getTodoItemForUpdate(todoId)
item.priority += 1
discard conn.updateTodoItem(item)
12 KiB
12 KiB