serializers.py 文件源码

def __init__(self, request, instance, *args, **kwargs):
        super(SnapshotDefineSerializer, self).__init__(request, instance, *args, **kwargs)

        if not kwargs.get('many', False):
            dc_settings = request.dc.settings

            # Limit maximum number of snapshots - Issue #chili-447
            if dc_settings.VMS_VM_SNAPSHOT_LIMIT_AUTO is None:
                min_count, max_count = RETENTION_MIN, RETENTION_MAX
            else:
                min_count, max_count = 1, int(dc_settings.VMS_VM_SNAPSHOT_LIMIT_AUTO)

            self.fields['retention'].validators.append(validators.MinValueValidator(min_count))
            self.fields['retention'].validators.append(validators.MaxValueValidator(max_count))

            if instance.vm.is_kvm():
                self._update_fields_ = list(self._update_fields_)
                self._update_fields_.append('fsfreeze')