Django 2.2 creates multiple migration files when AbstractUser is used

Dear All,

Empty DB, no migration is applied, I have a core app like:

#core.models

class Institute(models.Model):
    phone_regex = RegexValidator(regex=r'^\+?1?\d{9,15}$', message=institute_phone_help_text)

    name = models.CharField(_('name'), max_length=255)
    description = models.TextField(_('description'), blank=True)
    abbreviation = models.CharField(_('abbreviation'), blank=True, max_length=100)
    address = models.TextField(_('address'), blank=True)
    phone = models.CharField(validators=[phone_regex], max_length=17, blank=True)  # validators should be a list
    websites = ArrayField(models.URLField(max_length=255), verbose_name=_('websites'), blank=True, null=True)

    class Meta:
        verbose_name = _('institute')
        verbose_name_plural = _('institutes')

    def __str__(self):
        return '{0} ({1})'.format(self.name, self.abbreviation)


class User(AbstractUser):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    institute = models.ForeignKey(Institute, on_delete=models.CASCADE)
    params = JSONField(_('params'), null=True, blank=True,)
    about_me = models.TextField(_('about me'), blank=True,)

The app core is in the INSTALLED_APPS. 

If I run

./manage.py migrate

it correctly says that is not finding the core app, hence I run

./manage.py makemigrations core

It creates the migration file 001_initial*.

Now I run ./manage.py migrate and it works great,

But if I continue to run ./manage.py makemigrations it continues to add N core app migration file like:

# Generated by Django 2.2.1 on 2019-05-02 08:55

import django.contrib.auth.models
from django.db import migrations


class Migration(migrations.Migration):
    dependencies = [
        ('core', '0001_initial'),
    ]

    operations = [
        migrations.AlterModelManagers(
            name='user',
            managers=[
                ('objects', django.contrib.auth.models.UserManager()),
            ],
        ),
    ]

I tried various combinations but none worked:

./manage.py makemigrations core
./manage.py migrate core
./manage.py migrate

./manage.py makemigrations core
./manage.py makemigrations core

./manage.py makemigrations
./manage.py migrate

Linked to this question:

https://stackoverflow.com/questions/55923797/django-2-2-abstractuser-and-migration-issue

Is it a bug?

How can I solve this?

Thanks.

D

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/dea82e4c-b1f3-4740-be69-4a881cd473e7%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.