In a django save() method, how should you identify a new object if id is UUIDField?

Question

self.pk is None is not working, because it is generated automatically.

Any ideas?

Answer 1

Override from_db

@classmethod
def from_db(cls, db, field_names, values):
    instance = cls(*values)
    instance.saved = True
    return instance 

Then in your save method the instance.saved will be available when the item is something that has already been saved in the database.

 def save(self,*args,**kwargs):
     if hasttr(self,'saved'):
         print 'saved'

     super(MyModel,self).save(*args, **kwargs)
     self.saved = True