uncloud-mravi/matrixhosting/signals.py

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from matrixhosting.models import VMInstance
from uncloud_pay.models import Order
from django.db.models.signals import post_save
from django.dispatch import receiver
@receiver(post_save, sender=Order)
def create_instance(sender, instance, created, **kwargs):
machine = VMInstance.objects.filter(order=instance).first()
if not machine:
VMInstance.objects.create(owner=instance.owner, order=instance, config=instance.config)