How to use Django model inheritance with signals?

Question

I have a few model inheritance levels in Django:

class WorkAttachment(models.Model):
    \"\"\" Abstract class that holds all fields that are required in eac         


        

Answer 1

You could try something like:

model_classes = [WorkAttachment, WorkAttachmentFileBased, WorkAttachmentPicture, ...]

def update_attachment_count_on_save(sender, instance, **kwargs):
    instance.work.attachment_count += 1
    instance.work.save()

for model_class in model_classes:
    post_save.connect(update_attachment_count_on_save, 
                      sender=model_class, 
                      dispatch_uid="att_post_save_"+model_class.__name__)

(Disclaimer: I have not tested the above)