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mongoose Query object

model.find({}) instanceof mongoose.Query //true
model.find({}).lean() instanceof mongoose.Query //true

How to Query Obj in Mongoose

Person.
  find({
    occupation: /host/,
    'name.last': 'Ghost',
    age: { $gt: 17, $lt: 66 },
    likes: { $in: ['vaporizing', 'talking'] }
  }).
  limit(10).
  sort({ occupation: -1 }).
  select({ name: 1, occupation: 1 }).
  exec(callback);

mongoose query document

1.
model.updateOne(
   { <array>: value ... },
   { <update operator>: { "<array>.$" : value } }
)
db.students.updateOne(
   { _id: 4, "grades.grade": 85 },
   { $set: { "grades.$.std" : 6 } }
)