Plugin: trigger action only once after multiple m2m change.

[kemeris2000]

Hello,

I am working on an SSH Keys plugin. It contains the model netbox_ssh_keys.models.SSHList, which has a many-to-many relationship with both netbox_ssh_keys.models.SSHKey and virtualization.models.VirtualMachine.

My problem is that I cannot find the appropriate place to execute code after a form is edited (or updated via the API) when multiple many-to-many relationships are modified. I have tried using signals, but in this case, the code executes twice. I need it to execute only once, after both many-to-many updates have finished.:

@receiver(m2m_changed, sender=models.SSHList.virtual_machines.through)
def sshlist_vms_changed(sender, instance, action, pk_set, **kwargs):

@receiver(m2m_changed, sender=models.SSHList.ssh_keys.through)
def sshlist_sshkeys_changed(sender, instance, action, pk_set, **kwargs):

I also tried overriding form_valid() in the generic.ObjectEditView class, but it does not seem to be executed.

class SSHListEditView(generic.ObjectEditView):
    model = models.SSHList
    queryset = models.SSHList.objects.all()
    form = forms.SSHListForm

    def dispatch(self, request, *args, **kwargs):
        logger.debug(f"----DISPATCH---")
        return super().dispatch(request, *args, **kwargs)

    def form_valid(self, form):
        logger.debug(f"----VALID---")
        response = super().form_valid(form)