node.js - MongoError: Can't canonicalize query: BadValue -

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https://mongodb.github.io/node-mongodb-native/2.1/api/collection.html#findone

states max option used number.

var result =     yield mycol.findone({         lol: lol     }, {         max: 1     });

i error though:

 mongoerror: can't canonicalize query: badvalue $max must bsonobj       @ function.mongoerror.create (/home/karl/www/instantynode/src/node_modules/mongodb-core/lib/error.js:31:11)       @ querycallback (/home/karl/www/instantynode/src/node_modules/mongodb-core/lib/cursor.js:266:34)       @ callbacks.emit (/home/karl/www/instantynode/src/node_modules/mongodb-core/lib/topologies/server.js:95:3)       @ null.messagehandler (/home/karl/www/instantynode/src/node_modules/mongodb-core/lib/topologies/server.js:249:23)       @ socket.<anonymous> (/home/karl/www/instantynode/src/node_modules/mongodb-core/lib/connection/connection.js:265:22)       @ emitone (events.js:77:13)       @ socket.emit (events.js:169:7)       @ readableaddchunk (_stream_readable.js:146:16)       @ socket.readable.push (_stream_readable.js:110:10)       @ tcp.onread (net.js:523:20)

edit: realized method depreciated , using find better.

max amethod, not option, , takes bsondocument input:

var result =     yield mycol.findone({         lol: lol     }).max({field1:1});

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