Group Django model instances based on similar fields

1. add django_grouper to your INSTALLED_APPS
2. add path("", include("django_grouper.urls")) to your urlpatterns
3. go to /grouper and add the param group_content_type to specify which ContentType to group and the params group_fields to specify which fields to group by

If you define a GROUP_FILTER in you settings, the queryset in the /grouper view will be passed through this filter. The filter is expected to be a callable and will receive the queryset and the request as parameters. This means you can pass the queryset together with the request to a django-filter filter.

The /group view lets you select which objects of a list should be merged. If you double click an object, it will become the primary, a single click marks an object as secondary. There can be one primary and multiple secondaries. The primary and the list of secondaries are then passed to the trigger_merge signal. You can use this method to implement a custom merge method.

from django_grouper.signals import trigger_merge


@receiver(trigger_merge)
def react_on_merge_trigger(sender, primary, secondaries, **kwargs):
    primary.merge(secondaries)