Replaces the six per-field .not().isArray() guards from the previous
commit. Those were too narrow, and arbitrarily so.
PUT /:id spreads req.body into `updates` (crud.js:1631) and passes it to
.update() (:1990) with only targeted deletes in between — there is no
column allow-list. express-validator applies isInt/isIn/isBoolean
element-wise to arrays, so a single-element array satisfies its field
validator and survives the whole way to the column. That is true of all
44 validated fields, not of the protection block I happened to be
looking at; seven of them also run through formatBoolean, where [false]
reads as true.
So the guard belongs where the body is spread, not on chosen fields.
`customer_account_ids` is the only field legitimately an array — it has
an isArray() validator and its own element rules — and it is deleted
from `updates` before the write, so exempting it costs nothing.
Tested across the protection fields and two outside that block, plus the
customer_account_ids exemption. With the guard's condition disabled,
exactly those six array cases fail and the other 15 in the suite pass.
Refs #1296
Paul Nothaft
933f2d8e0e