[IMP] core: do not recompute stored field on new record

The use case is a cache miss of a stored field with compute on a new
record with origin.  The field should be computed only when explicitly
triggered, i.e., when a dependency has been modified.  Otherwise it
should be fetched from the origin record.

closes odoo/odoo#47353

Signed-off-by: Raphael Collet (rco) <rco@openerp.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/odoo/addons/test_new_api/tests/test_onchange.py b/odoo/addons/test_new_api/tests/test_onchange.py
index 5d544bd2875..398bd537bbd 100644
--- a/odoo/addons/test_new_api/tests/test_onchange.py
+++ b/odoo/addons/test_new_api/tests/test_onchange.py
@@ -678,3 +678,31 @@ class TestComputeOnchange(common.TransactionCase):
         form.foo = "foo6"
         self.assertEqual(form.bar, "foo6")
         self.assertEqual(form.baz, "baz5")
+
+    def test_onchange_one2many(self):
+        record = self.env['test_new_api.model_parent_m2o'].create({
+            'name': 'Family',
+            'child_ids': [
+                (0, 0, {'name': 'W', 'cost': 10}),
+                (0, 0, {'name': 'X', 'cost': 10}),
+                (0, 0, {'name': 'Y'}),
+                (0, 0, {'name': 'Z'}),
+            ],
+        })
+        record.flush()
+        self.assertEqual(record.child_ids.mapped('name'), list('WXYZ'))
+        self.assertEqual(record.cost, 22)
+
+        # modifying a line should not recompute the cost on other lines
+        with common.Form(record) as form:
+            with form.child_ids.edit(1) as line:
+                line.name = 'XXX'
+            self.assertEqual(form.cost, 15)
+
+            with form.child_ids.edit(1) as line:
+                line.cost = 20
+            self.assertEqual(form.cost, 32)
+
+            with form.child_ids.edit(2) as line:
+                line.cost = 30
+            self.assertEqual(form.cost, 61)