Proxy model for Multiple models in Django - django

Question

I would like to display a model in the django admin but with the logic to choose between 2 models to display.
Current Implementation:
Models
class User(models.Model):
created = models.DateTimeField(auto_now_add=True, null=True)
last_updated = models.DateTimeField(auto_now=True)
name = models.CharField(max_length=30, blank=True)
class ExpectedNames(User):
class Meta:
proxy=True`
Admin
#admin.register(ExpectedNames)
class ExpectedNamesAdmin(admin.ModelAdmin):
date_hierarchy = 'created'
What I Would like to DO: # something like this
Models
class User(models.Model):
created = models.DateTimeField(auto_now_add=True, null=True)
last_updated = models.DateTimeField(auto_now=True)
name = models.CharField(max_length=30, blank=True)
class User2(models.Model):
created = models.DateTimeField(auto_now_add=True, null=True)
last_updated = models.DateTimeField(auto_now=True)
name = models.CharField(max_length=30, blank=True)
class ExpectedNames(User):
class Meta:
proxy=True
if name == "Rick":
return User
else:
return User2
Admin
#admin.register(ExpectedNames)
class ExpectedNamesAdmin(admin.ModelAdmin):
date_hierarchy = 'created'
Any suggestions not sure if this is the correct way to do this.

Answer 1

I think this is not possible as it states in the Django Documentation:
Base class restrictions:
A proxy model must inherit from exactly one non-abstract model class. You can’t inherit from multiple non-abstract models as the proxy model doesn’t provide any connection between the rows in the different database tables. A proxy model can inherit from any number of abstract model classes, providing they do not define any model fields. A proxy model may also inherit from any number of proxy models that share a common non-abstract parent class.
https://docs.djangoproject.com/en/dev/topics/db/models/#proxy-models

Answer 2

I use magic method new in same situation.
I have model Documen with field document_type. If document_type is 'contract' i want ContractProxy, if 'offer' - OfferProxy.
For do this I create new proxy:
class RelatedDocumentProxy(Document):
class Meta:
proxy = True
def __new__(cls, *args, **kwargs):
doc_type = args[1]
if doc_type == 'contract':
return ContractProxy(*args, **kwargs)
return OfferProxy(*args, **kwargs)
document_type is first field and will first arg who pass to method