Infinite migrations without changes on code when Choices are store in a dictionary

[Roberto Fernandez Diaz]

I have this code on my model

class Alcance(models.Model):
    # CHOICES
    CONCEJO = 'CO'
    PROVINCIA = 'PR'
    PAIS = 'PA'

    ZONA_AFECTADA_OPTIONS = {
        (CONCEJO, 'concejo'),
        (PROVINCIA, 'provincia'),
        (PAIS, 'pais')
    }

    # DATABASE FIELDS
       ...
       zona_afectada = models.CharField(max_length=2, choices=ZONA_AFECTADA_OPTIONS, default='CO')

The problem is that each time I execute the command, manage.py makemigrations

It always detect a change on this part of the code, generating always a new migration file

Example :

accounts\migrations\0004_auto_20180610_1356.py

# Generated by Django 2.0 on 2018-06-10 13:56

from django.db import migrations, models


class Migration(migrations.Migration):

    dependencies = [
        ('accounts', '0003_auto_20180602_2019'),
    ]

    operations = [
        migrations.AlterField(
            model_name='alcance',
            name='zona_afectada',
            field=models.CharField(choices=[('PA', 'pais'), ('PR', 'provincia'), ('CO', 'concejo')], default='CO', max_length=2),
        ),
    ]

accounts\migrations\0005_auto_20180624_0126.py

# Generated by Django 2.0 on 2018-06-23 23:26

from django.db import migrations, models


class Migration(migrations.Migration):

    dependencies = [
        ('accounts', '0004_auto_20180610_1356'),
    ]

    operations = [
        migrations.AlterField(
            model_name='alcance',
            name='zona_afectada',
            field=models.CharField(choices=[('CO', 'concejo'), ('PR', 'provincia'), ('PA', 'pais')], default='CO', max_length=2),
        ),
    ]

accounts\migrations\0006_auto_20180624_1205.py

# Generated by Django 2.0 on 2018-06-24 10:05

from django.db import migrations, models


class Migration(migrations.Migration):

    dependencies = [
        ('accounts', '0005_auto_20180624_0126'),
    ]

    operations = [
        migrations.AlterField(
            model_name='alcance',
            name='zona_afectada',
            field=models.CharField(choices=[('PA', 'pais'), ('CO', 'concejo'), ('PR', 'provincia')], default='CO', max_length=2),
        ),
    ]

And so on...

As you can see the problem is due to the order in which the choices appear, that seems to be order randomly.

This is done without me changing the order of the elements of the dictionary or anything on the code that I show on the top.

[Alexandr Tatarinov]

First of all, you are using set, not dict. And order of elements in both of them are not fixed. So I believe this is not a problem with Django, store your choices in list or tuple as explained in documentation.