odoo/odoo#198202

Created by fw-bot
Merged at 7d146774cf87a3558d2e311edb89b2d8dc8561a6

Statuses:

label
odoo-dev:17.0-16.0-prefetch-new-lines-rco-416863-fw
head
e43bcae24abc387bdc441b22433e4646239f65aa
merged
8 months ago by Framework (ORM), Raphael Collet
odoo/odoo
16.0 #198124
17.0 #198202
saas-17.4 #198443
18.0 #198448
saas-18.1 #198454
saas-18.2 #198542
saas-18.3
saas-18.4
19.0
master #198749

[FW][FIX] core: prefetching of secondary new records

Consider a recordset of new records, and a loop like

for record in records:
    for line in record.line_ids:
        line.value

The implementation of record.line_ids does not actually prefetch all records. It actually fetches the field on the records' origin (their corresponding real records), but only assigns the current new record in cache. As the prefetching relies on the cached values of line_ids, the prefetching mechanism is actually broken on line.

The fix consists in assigning all the records to prefetch in this case. This does not add unexpected prefetching, since the origin records are prefetched as one batch anyway.

Forward-Port-Of: #198124