Django "makemigrations -- update" donot working

[Saifullah Shahen]

in my custom user model, initially, my model looks like this

class User(AbstractUser, BaseModelWithUUID):
    phone = models.CharField(max_length=11, validators=[validate_phone_number])

I do command "makemigrations" which create a initial migration file

but after updating my model like this

class User(AbstractUser, BaseModelWithUUID):
    phone = models.CharField(max_length=11, validators=[validate_phone_number])
    name = models.CharField(max_length=255)

after adding a field "name" when i run "makemigrations --update" it shows a error:

CommandError: Cannot update applied migration 'authentication.0001_initial'.

[Dipankar]

Please follow https://docs.djangoproject.com/en/4.1/topics/auth/customizing/

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Warm Regards,
Dipankar B.

[Muhammad Juwaini Abdul Rahman]

Do you need that '--update' parameter?

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[David Wobrock]

Hi,

As you can see, the error message seems quite clear:

> Cannot update applied migration 'authentication.0001_initial'.

One cannot edit a migration that has already been applied.

To update it, you can undo it by running "migrate authentication zero" and then run "makemigrations --update" again.

I do not think it's a bug in Django.

Cheers,

David

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[Adam Johnson]

Indeed, David is right. The --update flag is intended for developing a feature branch and adding extra changes to a work-in-progress migration. This is why it requires the migration to not be applied.

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