[FIX] lunch: fix lunch product report

closes odoo/odoo#35904

Signed-off-by: Romain Libert (rli) <rli@odoo.com>

addons/lunch/report/lunch_product_report.py

@@ -82,7 +82,7 @@ class LunchProductReport(models.Model):
                     product.new_until >= current_date AS is_new,
                     orders.last_order_date
                 FROM lunch_product product
-                INNER JOIN res_users users ON users.company_id = product.company_id -- multi company
+                INNER JOIN res_users users ON product.company_id IS NULL OR users.company_id = product.company_id -- multi company
                 INNER JOIN res_groups_users_rel groups ON groups.uid = users.id -- only generate for internal users
                 LEFT JOIN LATERAL (select max(date) AS last_order_date FROM lunch_order where user_id=users.id and product_id=product.id) AS orders ON TRUE
                 LEFT JOIN LATERAL (select user_id FROM lunch_product_favorite_user_rel where user_id=users.id and product_id=product.id) AS fav ON TRUE

addons/lunch/tests/__init__.py

@@ -2,4 +2,5 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from . import common
+from . import test_product_report
 from . import test_supplier

addons/lunch/tests/test_product_report.py

+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo.addons.lunch.tests.common import TestsCommon
+
+
+class TestLunchProductReport(TestsCommon):
+    def test_product_available(self):
+        self.assertTrue(self.env['lunch.product.report'].search([]), 'There should be some record on lunch_product_report')