fix: For headless mode, django CMS 4.2 adds preview buttons to all views. Do not add again.

Author: fsbraun

djangocms_versioning/cms_toolbars.py

@@ -37,6 +37,7 @@
 
 VERSIONING_MENU_IDENTIFIER = "version"
 CMS_SUPPORTS_DELETING_TRANSLATIONS = version.Version(cms_version) > version.Version("4.1.4")
+CMS_ADDS_PREVIEW_BUTTON = version.Version(cms_version) >= version.Version("4.2")
 
 
 class VersioningToolbar(PlaceholderToolbar):
@@ -270,7 +271,7 @@ def _add_view_published_button(self):
     def _add_preview_button(self):
         """Helper method to add a preview button to the toolbar when not in preview mode"""
         # Check if object is registered with versioning otherwise don't add
-        if not self._is_versioned():
+        if not self._is_versioned() or CMS_ADDS_PREVIEW_BUTTON:
             return
 
         if not self.toolbar.preview_mode_active and not self.toolbar.edit_mode_active: