Only one device by user about fcm-django

[Pablo849]

That's great, thanks for the effort. Thank you all for the contributions as well. Greetings.

[xtrinch]

Although you haven't mentioned how exactly your application should respond when a user with a registered device tries to register a new one:

When the user wants to register a new device, delete the old device from the same user.

Perhaps register a django pre-save handler and in it delete the old device.

[BojanKogoj]

You can also only use the last added device, though this could lead to weird issues

device = FCMDevice.objects.filter(user=user, active=True).last()

Or you could do what @xtrinch suggested, except in my example I use post_save

@receiver(post_save, sender=FCMDevice, dispatch_uid="my_unique_identifier")
def clean_old_devices(sender, instance, created, **kwargs):
    FCMDevice.objects.filter(user=instance.user, active=True).exclude(pk=instance.pk).delete()

[xtrinch]

I think this could probably be added to fcm-django settings and deleted within the package, since there seems to be a need for it.

[xtrinch]

I've added additional settings: ONE_DEVICE_PER_USER and DELETE_INACTIVE_DEVICES, with which you should be able to achieve all the above mentioned. Will be releasing a new version soon.