如何在mongodb中创建集合而没有任何使用nodejs中的mongoose的文档

I have tried to copy collections from first db to second db, collections those having documents are copied from first db to second db, but collections with no documents are not getting copied. when I tried to create new collection with empty document, collection gets created with one document containing id field.But my requirement is to create collection without any document in mongodb using mongoose.How to create empty collection in MongoDb using mongoose library and node.js. here goes the codeI have tried to copy collections from first db