[FIX] website_slides: fix slide.slide statistics compute method

The slide.slide and slide.channel "_compute_slides_statistics" methods do not
always assign a default value for the "total_slides" field.

This can cause some CacheMiss and seem related to nondeterministic errors on
the runbot.

Task#2123711
Runbot build error ID 247

closes odoo/odoo#41942

X-original-commit: c240d04ed0518897f76b315cd354ea6606aea645
Signed-off-by: awa-odoo <awa-odoo@users.noreply.github.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/addons/website_slides/tests/test_statistics.py b/addons/website_slides/tests/test_statistics.py
index 80ce7e5b7e6..79f0745aa2c 100644
--- a/addons/website_slides/tests/test_statistics.py
+++ b/addons/website_slides/tests/test_statistics.py
@@ -165,6 +165,7 @@ class TestSlideStatistics(common.SlidesCase):
             category.nbr_document,
             len(category.channel_id.slide_ids.filtered(lambda s: s.category_id == category and s.slide_type == 'document')))
 
+        self.assertEqual(self.channel.total_slides, 3, 'The channel should contain 3 slides')
         self.assertEqual(category.total_slides, 2, 'The first category should contain 2 slides')
         other_category = self.env['slide.slide'].with_user(self.user_officer).create({
             'name': 'Other Category',
@@ -179,3 +180,4 @@ class TestSlideStatistics(common.SlidesCase):
         self.slide_3.write({'sequence': 6})
         self.assertEqual(category.total_slides, 1, 'The first category should contain 1 slide')
         self.assertEqual(other_category.total_slides, 1, 'The other category should contain 1 slide')
+        self.assertEqual(self.channel.total_slides, 3, 'The channel should still contain 3 slides')