Django 2.2 creates multiple migration files when AbstractUser is used

[Daviddd]

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

[Simon Charette]

Hey David,

Could you try explicitly defining an objects manager on your User model and see it if helps.

e.g.

from django.contrib.auth.models import UserManager

class User(AbstractUser):

    ... # fields

    objects = UserManager()

I'm also having trouble reproducing locally though.

Simon

[douglas indumwa]

  Please answer all the questions in SECTION A and one question of your choice in SECTION B. SECTION A 1. Sort the below dictionary/array key using Javascript and output the information in key:value format on a Polymer interface. The entire numeric key should be sorted in an ascending order and all the alpha keys should be sorted in ascii, ascending order. (10 pts)

 Dictionary = {„34‟: ‟thirty-four‟, „90‟: „ninety‟, „91‟: „ninety-one‟„21‟: „twenty-one‟, „61‟: „sixty-one‟, „9‟: „nine‟, „2‟: „two‟, „6‟: „six‟, „3‟: „three‟, „8‟: „eight‟, „80‟: „eighty‟, „81‟: „eighty-one‟, „Ninety-Nine‟: ‟99‟, „nine-hundred‟: „900‟,} 

NB: The code snippet should be deployed using one of the two options below: 

a. A HTML5 cross-platform mobile application using Cordova. Use of standalone deployments like Node.js or Chrome execution deployments is accepted. 

b. A Django application on apache/nginx webserver and NOT the development server. This should also be deployed on a red-hat based Linux environment, preferably (CentOS) 

c. An Android java application with an executable APK build   

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