배열 안에 특정 레코드만 삭제하기

$pull 을 활용하여 배열 안에 특정 레코드만 삭제 할 수 있다.

before

{ _id: ObjectId("62aad6a97a158813a86ce9be"),
  signedBy: 
   [ { _id: ObjectId("62aad6c47a158813a86ce9f0"),
       user: '6156a3c9c7f00c0d4ace4744',
       signedTime: 2022-06-16T07:07:48.742Z },
      { _id: ObjectId("62aad6c47a158813a86ce9f0"),
       user: '6156a3c9c7f00c0d4ace4745',
       signedTime: 2022-06-16T07:08:49.242Z, } ]
}

update

$ db.documents.updateOne({'_id' : ObjectId('62aad6a97a158813a86ce9be')}, {$pull: {signedBy: {'user': '6156a3c9c7f00c0d4ace4744'} }} )

after

{ _id: ObjectId("62aad6a97a158813a86ce9be"),
  signedBy: 
   [       { _id: ObjectId("62aad6c47a158813a86ce9f0"),
       user: '6156a3c9c7f00c0d4ace4745',
       signedTime: 2022-06-16T07:08:49.242Z, } ]
}