Django making migrations
Consider the following three classes:
class UUIDModel(models.Model):
id = models.UUIDField(primary_key=True, editable=False, default=uuid.uuid4)
class Meta:
abstract = True
class TimeStampedUUIDModel(UUIDModel):
created = models.DateTimeField(auto_now_add=True, editable=False)
modified = models.DateTimeField(auto_now=True, editable=False)
class Meta:
abstract = True
class UsefulClass(TimeStampedUUIDModel):
name = models.CharField(max_length=150, unique=True)
creator = models.ForeignKey('OtherClass', on_delete=models.SET_NULL, null=True)
Based on these classes, when I am running the makemigrations
command, Django will create two migrations (on the very first run). One contains the id
, created
, modified
and name
(!) fields and the second one adds the creator
foreign key.
What could be the reason of the creation of two migrations, instead of just one?
@PrabinSapal is correct, you could reset your database using python manage.py reset_db --noinput
. Django
command that resets your Django
database, removing all data from all tables. This allows you to run all migrations again.