[Answered ]-Signal for M2M changed on a through field

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I feel silly for not figuring this out before. Instead of m2m_changed signal use the post_save and post_delete on the through model and it should essentially do the same thing. Then in my serializer just remove the instance.save() if I am not doing other changes. 

@receiver((post_save, post_delete), sender="main.OrderItem")
def update_order_when_items_changed(sender, instance, **kwargs):
    instance.order.set_weight()
    instance.order.set_total_price()
    instance.order.save()
👤Jared Mackey

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