Does get_or_create() have to save right away? (Django)

Question

I need to use something like get_or_create() but the problem is that I have a lot of fields and I don't want to set defaults (which don't make sense anyway), and if I don't set defaults it returns an error, because it saves the object right away apparently.

I can set the fields to null=True, but I don't want null fields.

Is there any other method or any extra parameter that can be sent to get_or_create() so that it instantiates an object but doesn't save it until I call save() on it?

Thanks.