Библиотека mongodb не работает с JSON Children

Question

Я пытаюсь найти фильтр в моем mongoDB.Для этого я использую find({}).project({a:0, b:1}), его работа!

Но при попытке find({}).project({a.b.c:0, b.c.d:1}) я получаю возврат:

{ MongoError: Projection cannot have a mix of inclusion and exclusion.
    at Connection.<anonymous> (/Users/joaquimflavio/Documents/GitHub/Simemap_repo/lambda_get_mongo/node_modules/mongodb/lib/core/connection/pool.js:466:61)
    at Connection.emit (events.js:189:13)
    at processMessage (/Users/joaquimflavio/Documents/GitHub/Simemap_repo/lambda_get_mongo/node_modules/mongodb/lib/core/connection/connection.js:364:10)
    at Socket.<anonymous> (/Users/joaquimflavio/Documents/GitHub/Simemap_repo/lambda_get_mongo/node_modules/mongodb/lib/core/connection/connection.js:533:15)
    at Socket.emit (events.js:189:13)
    at addChunk (_stream_readable.js:284:12)
    at readableAddChunk (_stream_readable.js:265:11)
    at Socket.Readable.push (_stream_readable.js:220:10)
    at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)
  ok: 0,
  errmsg: 'Projection cannot have a mix of inclusion and exclusion.',
  code: 2,
  codeName: 'BadValue',
  name: 'MongoError',
  [Symbol(mongoErrorContextSymbol)]: {} }