https://automattic.github.io/monk/docs/collection/findOne.html I stumbled upon this just now. when you want to exclude a projection on a query you should use 0 , not -1. ex. ``` //wrong use, the one in docs users.findOne({name: 'foo'}, { projection: {name: -1} }); //right one users.findOne({name: 'foo'}, { projection: {name: 0} }); ```