[FIX] web: remove default_ from parent record

When having a subview for a 2many field, if an onchange is triggered for
that field, the default values of the parent are still in the request
context.

To reproduce the issue:
(Need helpdesk_repair. Use demo data)
1. Helpdesk > Configuration > Helpdesk Teams, edit "Customer Care":
    - Enable "Repairs"
2. Create a storable and tracked-by-usn product P
3. Update the on-hand quantity:
    - 1 x P with serial S
4. Helpdesk > Customer Care (Tickets), create a ticket:
    - Product: P
    - Lot/Serial number: S
5. Click on Repair and save the repair order R
6. Edit R and add a line in "Parts"

Error: on the new line, both Product and Lot/Serial fields are already
filled with values P and S, which does not make sens

On step 5, when clicking on Repair, the form views of a repair order is
loaded with a specific context:
https://github.com/odoo/enterprise/blob/deef3c967d43862edf02dbcfc461fb89b064731e/helpdesk_repair/views/helpdesk_views.xml#L31-L34

Therefore, when editing the form and trying to add a new line in Parts,
an onchange is triggered but the default values are not removed from the
context. As a result, since the model `repair.line` also has two fields
called `product_id` and `lot_id`, the default values of the parent
(`repair.order`) are used.

When computing the context of a subview, the default values of the
parent should be removed.

OPW-2752436

closes odoo/odoo#89366

X-original-commit: db7423a97fd812fe6df95296fd7a6ca18854933b
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Signed-off-by: Adrien Widart <awt@odoo.com>

addons/web/static/src/legacy/js/views/basic/basic_model.js

@@ -1505,11 +1505,11 @@ var BasicModel = AbstractModel.extend({
         var makeDefaultRecords = [];
         if (additionalContexts){
             _.each(additionalContexts, function (context) {
-                params.context = self._getContext(list, {additionalContext: context});
+                params.context = self._getContext(list, {additionalContext: context, sanitize_default_values: true});
                 makeDefaultRecords.push(self._makeDefaultRecord(list.model, params));
             });
         } else {
-            params.context = self._getContext(list);
+            params.context = self._getContext(list, {sanitize_default_values: true});
             makeDefaultRecords.push(self._makeDefaultRecord(list.model, params));
         }
 
@@ -3489,7 +3489,12 @@ var BasicModel = AbstractModel.extend({
         context.set_eval_context(this._getEvalContext(element));
 
         if (options.full || !(options.fieldName || options.additionalContext)) {
-            context.add(element.context);
+            var context_to_add = options.sanitize_default_values ?
+                _.omit(element.context, function (val, key) {
+                    return _.str.startsWith(key, 'default_');
+                })
+                : element.context;
+            context.add(context_to_add);
         }
         if (options.fieldName) {
             var viewType = options.viewType || element.viewType;

addons/web/static/tests/legacy/views/form_tests.js

@@ -2648,6 +2648,44 @@ QUnit.module('Views', {
         form.destroy();
     });
 
+    QUnit.test('remove default value in subviews', async function (assert) {
+        assert.expect(2);
+
+        this.data.product.onchanges = {}
+        this.data.product.onchanges.name = function () {};
+
+        var form = await createView({
+            View: FormView,
+            model: 'partner',
+            data: this.data,
+            viewOptions: {
+                context: {default_state: "ab"}
+            },
+            arch: '<form string="Partners">' +
+                    '<field name="product_ids" context="{\'default_product_uom_qty\': 68}">' +
+                      '<tree editable="top">' +
+                        '<field name="name"/>' +
+                      '</tree>' +
+                    '</field>' +
+                  '</form>',
+            mockRPC: function (route, args) {
+                if (route === "/web/dataset/call_kw/partner/onchange") {
+                    assert.deepEqual(args.kwargs.context, {
+                        default_state: 'ab',
+                    })
+                }
+                else if (route === "/web/dataset/call_kw/product/onchange") {
+                    assert.deepEqual(args.kwargs.context, {
+                        default_product_uom_qty: 68,
+                    })
+                }
+                return this._super.apply(this, arguments);
+            },
+        });
+        await testUtils.dom.click(form.$('.o_field_x2many_list_row_add a'));
+        form.destroy();
+    });
+
     QUnit.test('reference field in one2many list', async function (assert) {
         assert.expect(1);