[FIX] web: List editable top select last row

Before this commit, when we have a list (editable top) in a form
with some mandatory fields and some existing rows. If we click on
'add a line', a new empty line appear on the top, then we click on
the last row, the empty row will disappear and we will have a
traceback.

After this commit, if we repeat this scenario, we click on the last
row, we will be able to edit this last row.

closes odoo/odoo#38471

X-original-commit: 996f77b03eaf6dd646b1816e7f70209d5ee6f8df
Signed-off-by: jbm-odoo <jbm-odoo@users.noreply.github.com>

addons/web/static/src/js/views/list/list_editable_renderer.js

@@ -1218,11 +1218,11 @@ ListRenderer.include({
             return Promise.resolve();
         }
         var wrap = options.wrap === undefined ? true : options.wrap;
+        var recordID = this._getRecordID(rowIndex);
 
         // Select the row then activate the widget in the correct cell
         var self = this;
         return this._selectRow(rowIndex).then(function () {
-            var recordID = self._getRecordID(rowIndex);
             var record = self._getRecord(recordID);
             if (fieldIndex >= (self.allFieldWidgets[record.id] || []).length) {
                 return Promise.reject();

addons/web/static/tests/views/list_tests.js

@@ -917,6 +917,43 @@ QUnit.module('Views', {
         form.destroy();
     });
 
+    QUnit.test('editable list view: click on last element after creation empty new line', async function (assert) {
+        assert.expect(1);
+
+        this.data.bar = {
+            fields: {
+                titi: {string: "Char", type: "char", required: true},
+                int_field: {string: "int_field", type: "integer", sortable: true, required: true}
+            },
+            records: [
+                {id: 1, titi: 'cui', int_field: 2},
+                {id: 2, titi: 'cuicui', int_field: 4},
+            ],
+        };
+        this.data.foo.records[0].o2m = [1, 2];
+
+        var form = await createView({
+            View: FormView,
+            model: 'foo',
+            data: this.data,
+            res_id: 1,
+            viewOptions: { mode: 'edit' },
+            arch: '<form>'+
+                    '<field name="o2m">'+
+                        '<tree editable="top">'+
+                            '<field name="int_field" widget="handle"/>'+
+                            '<field name="titi"/>'+
+                        '</tree>'+
+                    '</field>'+
+                '</form>',
+        });
+        await testUtils.dom.click(form.$('.o_field_x2many_list_row_add > a'));
+        await testUtils.dom.click(form.$('.o_data_row:last() > td.o_list_char'));
+        // This test ensure that they aren't traceback when clicking on the last row.
+        assert.containsN(form, '.o_data_row', 2, "list should have exactly 2 rows");
+        form.destroy();
+    });
+
     QUnit.test('basic operations for editable list renderer', async function (assert) {
         assert.expect(2);