feature/pedimentos-correccion-partidas

api/cuser/migrations/0005_customuser_rfc_fk_to_m2m.py

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+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+def copiar_rfc_a_m2m(apps, schema_editor):
+    """Copia el RFC singular (FK) al lado M2M antes de eliminar el FK."""
+    CustomUser = apps.get_model('cuser', 'CustomUser')
+    db_alias = schema_editor.connection.alias
+    for user in CustomUser.objects.using(db_alias).filter(rfc_old__isnull=False):
+        user.rfc.add(user.rfc_old)
+
+
+def revertir_m2m_a_fk(apps, schema_editor):
+    """En reversa: toma el primer RFC del M2M y lo pone de vuelta en el FK temporal."""
+    CustomUser = apps.get_model('cuser', 'CustomUser')
+    db_alias = schema_editor.connection.alias
+    for user in CustomUser.objects.using(db_alias).prefetch_related('rfc'):
+        primer_rfc = user.rfc.first()
+        if primer_rfc:
+            user.rfc_old = primer_rfc
+            user.save(update_fields=['rfc_old'])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cuser', '0004_alter_customuser_rfc'),
+        ('customs', '0015_partida_updated_at'),
+    ]
+
+    operations = [
+        # 1. Renombrar el FK actual a rfc_old para preservar los datos
+        migrations.RenameField(
+            model_name='customuser',
+            old_name='rfc',
+            new_name='rfc_old',
+        ),
+        # 2. Crear el nuevo campo M2M
+        migrations.AddField(
+            model_name='customuser',
+            name='rfc',
+            field=models.ManyToManyField(
+                blank=True,
+                help_text='RFCs de importadores asociados al usuario',
+                related_name='users',
+                to='customs.importador',
+            ),
+        ),
+        # 3. Copiar datos del FK al M2M
+        migrations.RunPython(copiar_rfc_a_m2m, revertir_m2m_a_fk),
+        # 4. Eliminar el FK temporal
+        migrations.RemoveField(
+            model_name='customuser',
+            name='rfc_old',
+        ),
+    ]

api/cuser/migrations/0006_customuser_active_organization.py

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+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cuser', '0005_customuser_rfc_fk_to_m2m'),
+        ('organization', '0003_organizacion_apply_auto_download'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='customuser',
+            name='active_organization',
+            field=models.ForeignKey(
+                blank=True,
+                help_text='Solo superusuarios: organización activa para contexto de trabajo',
+                null=True,
+                on_delete=django.db.models.deletion.SET_NULL,
+                related_name='superusers_activos',
+                to='organization.organizacion',
+            ),
+        ),
+    ]