Access document in the "deleteOne" post hook

[vineetdigit]

I have defined a post hook on the MessageSchema. And I was trying to access the document that was deleted.

The hook gets called after a successful deletion, but I am not able to use the document that was deleted in the post hook.

Is following behavior expected?

MessageSchema.post("deleteOne", (doc, next) => {
  console.log(doc, this);
  next();
});

{ n: 1, ok: 1, deletedCount: 1 } {}

[vkarpov15]

It is expected, because by default deleteOne() is a hook on Query#deleteOne(), not Document#deleteOne(). And when you call Query#deleteOne(), the document being deleted may not be in memory at the time of being deleted.

I'd recommend doing MessageSchema.post('deleteOne', { document: true, query: false }, function() { this; /* deleted doc */ }) to register a hook for Document#deleteOne(), or use findOneAndDelete() instead.