ci: Add deprecations for functions not available in cms v4 (#7458)

* Add deprecations
* Update message

cms/models/pluginmodel.py

@@ -1,3 +1,4 @@
+import inspect
 import json
 import os
 import warnings
@@ -310,6 +311,11 @@ def copy_plugin(self, target_placeholder, target_language, parent_cache, no_sign
         then overwriting its ID at step 5, the ORM will copy the custom
         fields for us.
         """
+
+        warnings.warn(f"{inspect.stack()[0][3]} is deprecated and will be removed in django CMS 4.1. "
+                      f"From version 4 on, please use cms.utils.copy_plugins_to_placeholder instead.",
+                      DeprecationWarning, stacklevel=2)
+
         try:
             plugin_instance, cls = self.get_plugin_instance()
         except KeyError:  # plugin type not found anymore

cms/utils/moderator.py

@@ -1,6 +1,10 @@
+import inspect
+import warnings
 
 
 def use_draft(request):
+    warnings.warn(f"{inspect.stack()[0][3]} is deprecated and will be removed in django CMS 4.1",
+                  DeprecationWarning, stacklevel=2)
     is_staff = (request.user.is_authenticated and request.user.is_staff)
     return is_staff and not request.session.get('cms_preview')
 
@@ -9,6 +13,8 @@ def get_model_queryset(model, request=None):
     """Decision function used in frontend - says which model should be used.
     Public models are used unless looking at preview or edit versions of the page.
     """
+    warnings.warn(f"{inspect.stack()[0][3]} is deprecated and will be removed in django CMS 4.1",
+                  DeprecationWarning, stacklevel=2)
     if request and use_draft(request):
         return model.objects.drafts()
     return model.objects.public()
@@ -17,10 +23,14 @@ def get_model_queryset(model, request=None):
 def get_title_queryset(request=None):
     from cms.models import Title
 
+    warnings.warn(f"{inspect.stack()[0][3]} is deprecated and will be removed in django CMS 4.1",
+                  DeprecationWarning, stacklevel=2)
     return Title.objects.all()
 
 
 def get_cmsplugin_queryset(request=None):
     from cms.models import CMSPlugin
 
+    warnings.warn(f"{inspect.stack()[0][3]} is deprecated and will be removed in django CMS 4.1",
+                  DeprecationWarning, stacklevel=2)
     return CMSPlugin.objects.all()