xos/synchronizer/model_policies/model_policy_Instance.py

from synchronizers.new_base.modelaccessor import *
from synchronizers.new_base.policy import Policy

class InstancePolicy(Policy):
    model_name = "Instance"

    def handle_create(self, instance):
        return self.handle_update(instance)

    def handle_update(self, instance):
        networks = [ns.network for ns in NetworkSlice.objects.filter(slice_id=instance.slice.id)]
        controller_networks = ControllerNetwork.objects.filter(controller_id=instance.node.site_deployment.controller.id)

        # a little clumsy because the API ORM doesn't support __in queries
        network_ids = [x.id for x in networks]
        controller_networks = [x for x in controller_networks if x.network.id in network_ids]

        for cn in controller_networks:
            if (cn.lazy_blocked):
                    self.logger.info("MODEL POLICY: instance %s unblocking network %s" % (instance, cn.network))
            cn.lazy_blocked=False
            cn.backend_register = '{}'
            cn.save()