a usecase of processing all documents from mongo for each time getting a document

mongo.find.cursor.usecase.js

// use of mongodb
//

let collection = mongoClient.db(databaseName).collection(collectionName);

let cursor = await collection.find();

while( await cursor.hasNext() ){
  let document = await cursor.next();
};


// use of mongoose
//

let collection = mongoose.connection.collection(collectionName);

let cursor = await collection.find();

while( await cursor.hasNext() ){
  let document = await cursor.next();
};