When trying to redo changes in custom cms plugin that has m2m field defined, exception is raised:
Internal Server Error: /fi/admin/djangocms_history/placeholderoperation/undo/
File "venv/local/lib/python2.7/site-packages/djangocms_history/action_handlers.py", line 111, in undo_change_plugin
plugin.model.objects.filter(pk=plugin.pk).update(**plugin.data)
File "venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 561, in update
query.add_update_values(kwargs)
File "venv/local/lib/python2.7/site-packages/django/db/models/sql/subqueries.py", line 128, in add_update_values
'foreign keys permitted).' % field
FieldError: Cannot update model field (only non-relations and foreign keys permitted).
Summary
When trying to redo changes in custom cms plugin that has m2m field defined, exception is raised:
Internal Server Error: /fi/admin/djangocms_history/placeholderoperation/undo/
File "venv/local/lib/python2.7/site-packages/djangocms_history/action_handlers.py", line 111, in undo_change_plugin plugin.model.objects.filter(pk=plugin.pk).update(**plugin.data) File "venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 561, in update query.add_update_values(kwargs) File "venv/local/lib/python2.7/site-packages/django/db/models/sql/subqueries.py", line 128, in add_update_values 'foreign keys permitted).' % field FieldError: Cannot update model field (only non-relations and foreign keys permitted).
Expected behaviour
Plugin content is reverted
Actual behaviour
Exception is raised
Environment