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Actually save the m2m on the destination for Wagtail/ClusterableModel #857

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Actually save the m2m on the destination for Wagtail/ClusterableModel #857

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6 changes: 6 additions & 0 deletions model_clone/mixin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -718,6 +718,8 @@ def __duplicate_linked_m2m_fields(self, duplicate):
:return: The duplicate instance objects from all the many-to-many fields duplicated.
"""

changed = False

for field in self._meta.many_to_many:
if all(
[
Expand All @@ -729,5 +731,9 @@ def __duplicate_linked_m2m_fields(self, duplicate):
source = getattr(self, field.attname)
destination = getattr(duplicate, field.attname)
destination.set(list(source.all()))
changed = True

if changed:
duplicate.save()

return duplicate