[Python] Convert property to django model field

Is there any way to create virtual model field in django?

For example I have

class A(models.Model):
field_1 = models.CharField(max_length=100)
field_2 = models.CharField(max_length=100)

@apply
def virtual_field():
def fget(self):
return self.field1 + '/' + self.field2
def fset(self, value):
self.field_1, self_field_2 = value.split('/')
return True
return property(**locals())


Now, if I will run:

a = A()
a.virtual_field = '5/5'
a.save()


It will work fine.

But I have a dump, where I have model A with virtual_field value - on serialization I've got an error "A object has no virtual_field"... How I can cheat serializer and tell it, that virtual_field exists?

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