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Check for content types with no model classes #13508

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10 changes: 9 additions & 1 deletion netbox/utilities/fields.py
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Original file line number Diff line number Diff line change
Expand Up @@ -112,9 +112,15 @@ def get_prefetch_queryset(self, instances, queryset=None):
for ct_id, fkeys in fk_dict.items():
instance = instance_dict[ct_id]
ct = self.get_content_type(id=ct_id, using=instance._state.db)
model = ct.model_class()
# Skip this content type if the model class doesn't exist. This can happen if
# the search index contains data for content types that belong to a plugin
# that is no longer installed.
if model is None:
continue
if restrict_params:
# Override the default behavior to call restrict() on each model's queryset
qs = ct.model_class().objects.filter(pk__in=fkeys).restrict(**restrict_params)
qs = model.objects.filter(pk__in=fkeys).restrict(**restrict_params)
ret_val.extend(qs)
else:
# Default behavior
Expand All @@ -130,6 +136,8 @@ def gfk_key(obj):
model = self.get_content_type(
id=ct_id, using=obj._state.db
).model_class()
if model is None:
return None
return (
model._meta.pk.get_prep_value(getattr(obj, self.fk_field)),
model,
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