[FIX] web: list multi edit: prevent force save

Have a list with multi_edit enabled
Have a widget boolean_toggle displayed on some field
Select some records to be in multi edit mode

Before this commit, the record on which the boolean toggle button was clicked was written
and then the multi edit feature was triggered and wrote on all the records
The first write is unnecessary and counter intuitive

After this commit, only the write with all the multi edited records is done

3 files changed, 42 insertions, 1 deletions

diff --git a/addons/web/static/src/js/views/basic/basic_controller.js b/addons/web/static/src/js/views/basic/basic_controller.js
index b58a4154e1f..001154d29b4 100644
--- a/addons/web/static/src/js/views/basic/basic_controller.js
+++ b/addons/web/static/src/js/views/basic/basic_controller.js
@@ -706,7 +706,7 @@ var BasicController = AbstractController.extend(FieldManagerMixin, {
      * @param {OdooEvent} ev
      */
     _onFieldChanged: function (ev) {
-        if (this.mode === 'readonly') {
+        if (this.mode === 'readonly' && !('force_save' in ev.data)) {
             ev.data.force_save = true;
         }
         FieldManagerMixin._onFieldChanged.apply(this, arguments);
diff --git a/addons/web/static/src/js/views/list/list_controller.js b/addons/web/static/src/js/views/list/list_controller.js
index 5a8bb698942..0e1921883ff 100644
--- a/addons/web/static/src/js/views/list/list_controller.js
+++ b/addons/web/static/src/js/views/list/list_controller.js
@@ -835,6 +835,9 @@ var ListController = BasicController.extend({
             ev.data.onFailure = saveMulti; // will show the appropriate dialog
             // disable onchanges as we'll save directly
             ev.data.notifyChange = false;
+            // In multi edit mode, we will be asked if we want to write on the selected
+            // records, so the force_save for readonly is not necessary.
+            ev.data.force_save = false;
         }
         this._super.apply(this, arguments);
     },
diff --git a/addons/web/static/tests/views/list_tests.js b/addons/web/static/tests/views/list_tests.js
index b9b747dbc7d..5c30d59593c 100644
--- a/addons/web/static/tests/views/list_tests.js
+++ b/addons/web/static/tests/views/list_tests.js
@@ -7709,6 +7709,44 @@ QUnit.module('Views', {
         list.destroy();
     });
 
+    QUnit.test('editable list view (multi edition): writable fields in readonly (force save)', async function (assert) {
+        assert.expect(7);
+
+        // boolean toogle widget allows for writing on the record even in readonly mode
+        const list = await createView({
+            arch: `
+                <tree multi_edit="1">
+                    <field name="bar" widget="boolean_toggle"/>
+                </tree>`,
+            data: this.data,
+            model: 'foo',
+            View: ListView,
+            mockRPC(route, args) {
+                assert.step(args.method || route);
+                if (args.method === 'write') {
+                    assert.deepEqual(args.args, [[1,3], {bar: false}]);
+                }
+                return this._super(...arguments);
+            }
+        });
+
+        assert.verifySteps(['/web/dataset/search_read']);
+        // select two records
+        await testUtils.dom.click(list.$('.o_data_row:eq(0) .o_list_record_selector input'));
+        await testUtils.dom.click(list.$('.o_data_row:eq(2) .o_list_record_selector input'));
+
+        await testUtils.dom.click(list.$('.o_data_row .o_field_boolean')[0]);
+
+        assert.ok($('.modal').text().includes("Confirmation"), "Modal should ask to save changes");
+        await testUtils.dom.click($('.modal .btn-primary'));
+        assert.verifySteps([
+            'write',
+            'read',
+        ]);
+
+        list.destroy();
+    });
+
     QUnit.test('editable list view: multi edition with readonly modifiers', async function (assert) {
         assert.expect(5);