X_N_PLUS_ONE_QUERY

a read repeated once per row

one lookup per row of a page — members.findById fifty times where one in statement would answer. Counted per request by the statement ledger x dev installs, and never counted in production. Reported on four surfaces at once: x dev's findings, /_x/timeline's nPlusOne, the browser overlay under the error, and one logger.warn per request per code. Thrown in one place only — a test that destructures @ultimat3/testing's statements fixture, where the loop's fifth statement rejects and fails the test

the fix is the preload the schema already declares, e.g. db.posts.preload('author'). No relation points at the entity ⇒ the batched form of the same read, db.members.andWhere('id', 'in', ids).all(). A loop that is genuinely one statement per row is declared, not silenced: expectedQueryLoop('<why>', fn)