from django.db import migrations

def crear_importadores_desde_pedimentos(apps, schema_editor):
    Pedimento = apps.get_model('customs', 'Pedimento')
    Importador = apps.get_model('customs', 'Importador')
    Organizacion = apps.get_model('organization', 'Organizacion')
    rfcs_orgs = Pedimento.objects.values_list('contribuyente', 'organizacion_id').distinct()
    for rfc, org_id in rfcs_orgs:
        if rfc and not Importador.objects.filter(rfc=rfc).exists():
            organizacion = Organizacion.objects.get(id=org_id) if org_id else None
            Importador.objects.create(rfc=rfc, nombre='', organizacion=organizacion)

class Migration(migrations.Migration):

    dependencies = [
        ('customs', '0009_importador'),
    ]

    operations = [
        migrations.RunPython(crear_importadores_desde_pedimentos),
    ]