[Answered ]-Django related_name with _set function

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related_name defines the name of reverse relation, so in your case, there is no model with relation contact_owner_set.

For example, if you want to access client contacts, you should use the client.contact_client attribute; if you want to get the contact’s actions, you have to use the contact.action_contact attribute.

But there is no relation contact_owner_set in particular here:

self.fields['contact_owner'].queryset = self.instance.client_owner.contact_owner_set.order_by('name')

self.instance.client_owner is Client instance and Client instance has no attribute contact_owner_set.

And you definitely have to rename your related_name by using plural for more code readability.

👤Oleksii Tambovtsev

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