diff --git a/addons/website_slides/controllers/main.py b/addons/website_slides/controllers/main.py
index db4088d193f..fbd4707c40a 100644
--- a/addons/website_slides/controllers/main.py
+++ b/addons/website_slides/controllers/main.py
@@ -345,6 +345,20 @@ class WebsiteSlides(WebsiteProfile):
 
     @http.route(['/slides/all', '/slides/all/tag/<string:slug_tags>'], type='http', auth="public", website=True, sitemap=True)
     def slides_channel_all(self, slide_category=None, slug_tags=None, my=False, **post):
+        if slug_tags and request.httprequest.method == 'GET':
+            # Redirect `tag-1,tag-2` to `tag-1` to disallow multi tags
+            # in GET request for proper bot indexation;
+            # if the search term is available, do not remove any existing
+            # tags because it is user who provided search term with GET
+            # request and so clearly it's not SEO bot.
+            tag_list = slug_tags.split(',')
+            if len(tag_list) > 1 and not post.get('search'):
+                url = QueryURL('/slides/all', ['tag'], tag=tag_list[0], my=my, slide_category=slide_category)()
+                return request.redirect(url, code=302)
+        render_values = self.slides_channel_all_values(slide_category=slide_category, slug_tags=slug_tags, my=my, **post)
+        return request.render('website_slides.courses_all', render_values)
+
+    def slides_channel_all_values(self, slide_category=None, slug_tags=None, my=False, **post):
         """ Home page displaying a list of courses displayed according to some
         criterion and search terms.
 
@@ -359,22 +373,6 @@ class WebsiteSlides(WebsiteProfile):
 
            * ``search``: filter on course description / name;
         """
-
-        # retro-compatibility for older links, 'slide_category' field was previously named 'slide_type'
-        # can be safely removed after 15.3 (I swear though, don't be afraid, remove it!)
-        slide_category = slide_category or post.get('slide_type')
-
-        if slug_tags and request.httprequest.method == 'GET':
-            # Redirect `tag-1,tag-2` to `tag-1` to disallow multi tags
-            # in GET request for proper bot indexation;
-            # if the search term is available, do not remove any existing
-            # tags because it is user who provided search term with GET
-            # request and so clearly it's not SEO bot.
-            tag_list = slug_tags.split(',')
-            if len(tag_list) > 1 and not post.get('search'):
-                url = QueryURL('/slides/all', ['tag'], tag=tag_list[0], my=my, slide_category=slide_category)()
-                return request.redirect(url, code=302)
-
         options = {
             'displayDescription': True,
             'displayDetail': False,
@@ -416,7 +414,7 @@ class WebsiteSlides(WebsiteProfile):
             'slide_query_url': QueryURL('/slides/all', ['tag']),
         })
 
-        return request.render('website_slides.courses_all', render_values)
+        return render_values
 
     def _prepare_additional_channel_values(self, values, **kwargs):
         return values