$elemMatch and update

Question

I would like to update a subdocument that was fetched using $elemMatch. I\'ve found some posts online but so far I am not able to get it to work. This is what I have:

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Answer 1

You can do this all with a single update call on the model instead of fetching it first with findOne:

User.update(
  {'addresses._id': address_id},
  {$set: {'addresses.$.street': 'Blah'}},
  function(err, count) { ... });

This uses the positional $ operator in the $set to target just the addresses element that was matched in the query.