🐛(migrations) use settings in migrations

Use settings directly in migrations to avoid noop
migrations. This might have undisered side effects
if we change the config over time 'invalid' data will be
in the database.

It's a simple quick fix.
Keeping some migrations that are no useless to avoid changing
too much the migration history for users.

Similar to https://github.com/suitenumerique/people/commit/
469014ac415b25be0ceed08b31a87d2d40d743cd

CHANGELOG.md

@@ -12,6 +12,10 @@ and this project adheres to
 
 - 🔒️(backend) enhance API input validation to strengthen security #1053
 
+### Fixed
+
+- 🐛(migrations) use settings in migrations #1058
+
 ## [1.9.0] - 2026-03-02
 
 ### Added

src/backend/core/migrations/0001_initial.py

@@ -44,7 +44,7 @@ class Migration(migrations.Migration):
                 ('sub', models.CharField(blank=True, help_text='Optional for pending users; required upon account activation. 255 characters or fewer. Letters, numbers, and @/./+/-/_ characters only.', max_length=255, null=True, unique=True, validators=[django.core.validators.RegexValidator(message='Enter a valid sub. This value may contain only letters, numbers, and @/./+/-/_ characters.', regex='^[\\w.@+-]+\\Z')], verbose_name='sub')),
                 ('email', models.EmailField(blank=True, max_length=254, null=True, verbose_name='identity email address')),
                 ('admin_email', models.EmailField(blank=True, max_length=254, null=True, unique=True, verbose_name='admin email address')),
-                ('language', models.CharField(choices="(('en-us', 'English'), ('fr-fr', 'French'))", default='en-us', help_text='The language in which the user wants to see the interface.', max_length=10, verbose_name='language')),
+                ('language', models.CharField(choices=settings.LANGUAGES, default=settings.LANGUAGE_CODE, help_text='The language in which the user wants to see the interface.', max_length=10, verbose_name='language')),
                 ('timezone', timezone_field.fields.TimeZoneField(choices_display='WITH_GMT_OFFSET', default='UTC', help_text='The timezone in which the user wants to see times.', use_pytz=False)),
                 ('is_device', models.BooleanField(default=False, help_text='Whether the user is a device or a real user.', verbose_name='device')),
                 ('is_staff', models.BooleanField(default=False, help_text='Whether the user can log into this admin site.', verbose_name='staff status')),
@@ -96,7 +96,7 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='resource',
             name='users',
-            field=models.ManyToManyField(related_name='resources', through='core.ResourceAccess', to=settings.AUTH_USER_MODEL),
+            field=models.ManyToManyField(related_name='resources', through='core.ResourceAccess', through_fields=('resource', 'user'), to=settings.AUTH_USER_MODEL),
         ),
         migrations.AddConstraint(
             model_name='resourceaccess',

src/backend/core/migrations/0004_alter_user_language.py

@@ -1,5 +1,5 @@
 # Generated by Django 5.0.7 on 2024-08-07 14:39
-
+from django.conf import settings
 from django.db import migrations, models
 
 
@@ -13,6 +13,6 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='user',
             name='language',
-            field=models.CharField(choices="(('en-us', 'English'), ('fr-fr', 'French'))", default='en-us', help_text='The language in which the user wants to see the interface.', max_length=10, verbose_name='language'),
+            field=models.CharField(choices=settings.LANGUAGES, default=settings.LANGUAGE_CODE, help_text='The language in which the user wants to see the interface.', max_length=10, verbose_name='language'),
         ),
     ]

src/backend/core/migrations/0013_alter_user_language.py

@@ -1,5 +1,5 @@
 # Generated by Django 5.1.8 on 2025-04-22 14:52
-
+from django.conf import settings
 from django.db import migrations, models
 
 
@@ -13,6 +13,6 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='user',
             name='language',
-            field=models.CharField(choices="(('en-us', 'English'), ('fr-fr', 'French'), ('nl-nl', 'Dutch'))", default='en-us', help_text='The language in which the user wants to see the interface.', max_length=10, verbose_name='language'),
+            field=models.CharField(choices=settings.LANGUAGES, default=settings.LANGUAGE_CODE, help_text='The language in which the user wants to see the interface.', max_length=10, verbose_name='language'),
         ),
     ]