fix: template tag get_admin_url_for_language did not return the latest page content (#7967)

* Fix: template tag `get_admin_url_for_language` should return the latest page content object for the language (even if unpublished)

* Fix: correct read-only slug and overwrite url for page settings

Author: fsbraun

cms/admin/forms.py

@@ -421,7 +421,7 @@ def save(self, *args, **kwargs):
         )
 
         if is_first and not new_page.is_page_type:
-            # its the first page. Make it the homepage
+            # it's the first page. Make it the homepage
             new_page.set_as_homepage(self._user)
 
         send_post_page_operation(
@@ -542,7 +542,6 @@ class ChangePageForm(BasePageContentForm):
         coerce=int,
         empty_value=None,
     )
-
     fieldsets = (
         (
             None,

cms/admin/pageadmin.py

@@ -899,6 +899,20 @@ def get_form(self, request, obj=None, **kwargs):
         form._request = request
         return form
 
+    def slug(self, obj):
+        # For read-only views: Get slug from the page
+        if not hasattr(self, "url_obj"):
+            self.url_obj = obj.page.get_url(obj.language)
+        return self.url_obj.slug
+
+    def overwrite_url(self, obj):
+        # For read-only views: Get slug from the page
+        if not hasattr(self, "url_obj"):
+            self.url_obj = obj.page.get_url(obj.language)
+        if self.url_obj.managed:
+            return None
+        return self.url_obj.path
+
     def duplicate(self, request, object_id):
         """
         Leverages the add view logic to duplicate the page.

cms/templatetags/cms_admin.py

@@ -35,7 +35,7 @@ class GetAdminUrlForLanguage(AsTag):
 
     def get_value(self, context, page, language):
         if language in page.get_languages():
-            page_content = page.pagecontent_set(manager="admin_manager").current_content(language=language).first()
+            page_content = page.pagecontent_set(manager="admin_manager").latest_content(language=language).first()
             if page_content:
                 return admin_reverse('cms_pagecontent_change', args=[page_content.pk])
         admin_url = admin_reverse('cms_pagecontent_add')