[FIX] web: don't remove sample data on view switch

This commit solves an issue where sample data would be erased when the
user switches from a view with no sample data to another that should
contain them. This commit also removes unnecessary usage of nextTick in
assets loading.

Steps to reproduce:
- go to project and open one
- enter a no match filter and save it as favorite
- reload
- switch from kanban to calendar view and switch back to kanban
- after the fix, sample data should no longer be erased from kanban

task-3701143

closes odoo/odoo#152666

X-original-commit: a8ff1465c6c31240d06c98fa5d61e146b3908cf0
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Signed-off-by: Julien Carion (juca) <juca@odoo.com>

addons/web/static/src/model/model.js

@@ -133,11 +133,9 @@ export function useModelWithSampleData(ModelClass, params, options = {}) {
 
     const globalState = component.props.globalState || {};
     const localState = component.props.state || {};
-    let useSampleModel = Boolean(
-        "useSampleModel" in globalState
-            ? globalState.useSampleModel
-            : component.props.useSampleModel
-    );
+    let useSampleModel =
+        component.props.useSampleModel &&
+        (!("useSampleModel" in globalState) || globalState.useSampleModel);
     model.useSampleModel = useSampleModel;
     const orm = model.orm;
     let sampleORM = localState.sampleORM;
@@ -179,7 +177,9 @@ export function useModelWithSampleData(ModelClass, params, options = {}) {
 
     useSetupView({
         getGlobalState() {
-            return { useSampleModel };
+            if (component.props.useSampleModel) {
+                return { useSampleModel };
+            }
         },
         getLocalState: () => {
             return { sampleORM };

addons/web/static/tests/views/calendar/calendar_view_tests.js

@@ -5426,4 +5426,62 @@ QUnit.module("Views", ({ beforeEach }) => {
             "00 - bazar0 - chouette1 - brol10 - machin11 - chose100 - bidule1011000 - trucEdên@Hello#HelloJean-Paul 1Jean-Paul 2JeremyKévinRomelüThibaùltZoooroUndefined"
         );
     });
+
+    QUnit.test(
+        "sample data are not removed when switching back from calendar view",
+        async function (assert) {
+            serverData.models.event.records = [];
+            serverData.actions = {
+                1: {
+                    id: 1,
+                    name: "Partners",
+                    res_model: "event",
+                    type: "ir.actions.act_window",
+                    views: [
+                        [false, "list"],
+                        [false, "calendar"],
+                    ],
+                },
+            };
+
+            serverData.views = {
+                "event,false,calendar": `<calendar date_start="start" date_stop="stop" mode="day"/>`,
+                "event,false,list": `<tree sample="1">
+                    <field name="start"/>
+                    <field name="stop"/>
+                </tree>`,
+
+                "event,false,search": `<search />`,
+            };
+
+            const webClient = await createWebClient({
+                serverData,
+                async mockRPC(route, args) {
+                    if (args.method === "check_access_rights") {
+                        return true;
+                    }
+                    if (route.endsWith("/has_group")) {
+                        return true;
+                    }
+                },
+            });
+
+            await doAction(webClient, 1);
+
+            assert.containsOnce(target, ".o_list_view", "should have rendered a list view");
+            assert.containsOnce(target, ".o_view_sample_data", "should have sample data");
+
+            await click(target, ".o_cp_switch_buttons .o_calendar");
+            assert.containsOnce(
+                target,
+                ".o_calendar_container",
+                "should have rendered a calendar view"
+            );
+
+            await click(target, ".o_cp_switch_buttons .o_list");
+
+            assert.containsOnce(target, ".o_list_view", "should have rendered a list view");
+            assert.containsOnce(target, ".o_view_sample_data", "should have sample data");
+        }
+    );
 });