How does mongodb view the current url

  mongodb, question

db.mycollection.find()
{ “_id” : ObjectId(“5be2c9ebda9c816c79d9b531”), “name” : “alex”, “id” : “888”, “url” : [ “www.baidu.com”, “www.souhu.com” ] }

For example, how do I check the current url? Several urls

This is all obtained through url.length after the mycollection data is found.