Remove sub-document from Mongo with mongoose

Question

I am trying to remove an item from a collection that is stored in a mongoose document. My document looks like this:

{
  \"__v\": 3,
  \"_id\": \"5221040475f         


        

Answer 1

Removing a subdocument from an array

The nicest and most complete solution I have found that both finds and removes a subdocument from an array is using Mongoose's $pull method:

Collection.findOneAndUpdate(
    { _id: yourCollectionId },
    { $pull: { subdocumentsArray: { _id: subdocumentId} } },
    { new: true },
    function(err) {
        if (err) { console.log(err) }
    }
)

The {new: true} ensures the updated version of the data is returned, rather than the old data.