[IMP] core: introduce search_fetch() and fetch()

closes odoo/documentation#3749

Related: odoo/odoo#114551
Signed-off-by: Raphael Collet <rco@odoo.com>

content/developer/reference/backend/orm.rst

@@ -615,6 +615,12 @@ for partners and one for countries::
         country = partner.country_id        # first pass prefetches all partners
         countries.add(country.name)         # first pass prefetches all countries
 
+.. seealso::
+    The methods :meth:`~odoo.models.Model.search_fetch` and
+    :meth:`~odoo.models.Model.fetch` can be used to populate the cache of
+    records, typically in cases where the prefetching mechanism does not work
+    well.
+
 
 .. _reference/api/decorators:
 
@@ -845,8 +851,12 @@ Search/Read
 
 .. automethod:: Model.search_count
 
+.. automethod:: Model.search_fetch
+
 .. automethod:: Model.name_search
 
+.. automethod:: Model.fetch
+
 .. automethod:: Model.read
 
 .. automethod:: Model.read_group

content/developer/reference/backend/orm/changelog.rst

@@ -4,6 +4,15 @@
 Changelog
 =========
 
+Odoo Online version 16.2
+========================
+
+- Refactor the implementation of searching and reading methods to be able to
+  combine both in a minimal number of SQL queries. We introduce two new methods
+  `odoo.models.Model.search_fetch` and `odoo.models.Model.fetch` that take
+  advantage of the combination. More details can be found on the pull request
+  `#112126 <https://github.com/odoo/odoo/pull/112126>`_.
+
 Odoo version 16.0
 =================