Using Django model inheritence to clone a table - django

Question

I have a user table and want to create a backup table named deleted_users that is a clone of the user table. When a user gets deleted I want to move the record from the user table to the deleted_users table.
class LCUser(models.Model):
email = models.EmailField(max_length=100,unique=True)
password = models.CharField(max_length=100)
first_name = models.CharField(max_length=100)
last_name=models.CharField(max_length=100)
class Meta:
db_table = "user"
class LCUserDeleted(LCUser):
deleted_at = models.DateTimeField(auto_now_add=True,null=True)
class Meta:
db_table = "deleted_users"
I tried as above but this creates the user table with all the fields and a deleted_users table with 2 fields ( lcusers_ptr_id and deleted_at ), How can I create the 2nd table with all the fields without typing everything one by one ?

Answer 1

to achieve what you're looking for you actually need 3 models, one abstract one and two actual models:
class BaseLCUser(models.Model):
email = models.EmailField(max_length=100,unique=True)
password = models.CharField(max_length=100)
first_name = models.CharField(max_length=100)
last_name=models.CharField(max_length=100)
class Meta:
abstract = True
class LCUser(BaseLCUser):
class Meta:
db_table = "user"
class LCUserDeleted(BaseLCUser):
deleted_at = models.DateTimeField(auto_now_add=True,null=True)
class Meta:
db_table = "deleted_users"
By using an abstract model as a common parent Django will actually create full tables for each of the models.
Edit:
Regarding the unique E-mail, you might want to avoid setting it to unique on a database level, and control it through your forms, because if you create and account with email example#example.org, delete it, create another one with the same email and delete than new account, you will be trying to have two deleted users with the same email.
another option would be to remove the email field from the abstract Model, and put it in each of the child models, being unique only in the not deleted user.