(node:71307) [DEP0079] DeprecationWarning

Question

Try to update MongoDB document Getting Deprecation Warning as

(node:71307) [DEP0079] DeprecationWarning: Custom inspection function on Objects via

Answer 1

Totally random but at least it's not a copycat answer: I was getting this deprecation warning (and unexpected behavior) when I accidentally used Model.find() instead of Model.findOne()

So my erroneous code looked like this

User.find(query)
.then(user => {
  console.log(user.emailSettings.confirmToken)
})

...with an ordinary object/array, this would fail with TypeError: Cannot read property 'confirmToken' of undefined but with an mongo document array apparently it does this inspecty thing and now gives this deprecation warning.

Answer 2

upgrade to 5.2.10 and set

  mongoose.set('useCreateIndex', true);