_id:ObjectId(5ce3c94f0e259e7370966c63)
status:Int32(1)
title:String(dfsb)
content:String(fdbfdbfd)
Array(visits):[
]
Array(visits_online):[
    0:Object
        start:Date(2019-05-22T08:06:50.222+00:00)
        _id:ObjectId(5ce5031ae8ee2e83b9ab23ff)
        session_id:ObjectId(5ce3c94f0e259e7370966c63)
        user_id:ObjectId(5ce4f290e2971cc6791e5a11)
        end:Date(2019-05-22T08:06:51.438+00:00)
    1:Object
        start:Date(2019-05-22T08:07:11.512+00:00)
        _id:ObjectId(5ce5032fe8ee2e83b9ab2403)
        session_id:ObjectId(5ce3c94f0e259e7370966c63)
        user_id:ObjectId(5ce4f290e2971cc6791e5a11)
        end:Date(2019-05-22T08:07:11.791+00:00)
]

_id:ObjectId(5ce3c94f0e259e7370966c63)
status:Int32(1)
title:String(dfsb)
content:String(fdbfdbfd)
Array(visits):[
        0:Object
        start:Date(2019-05-22T08:06:50.222+00:00)
        _id:ObjectId(5ce5031ae8ee2e83b9ab23ff)
        session_id:ObjectId(5ce3c94f0e259e7370966c63)
        user_id:ObjectId(5ce4f290e2971cc6791e5a11)
        end:Date(2019-05-22T08:06:51.438+00:00)
]
Array(visits_online):[
    1:Object
        start:Date(2019-05-22T08:07:11.512+00:00)
        _id:ObjectId(5ce5032fe8ee2e83b9ab2403)
        session_id:ObjectId(5ce3c94f0e259e7370966c63)
        user_id:ObjectId(5ce4f290e2971cc6791e5a11)
        end:Date(2019-05-22T08:07:11.791+00:00)
]

Session.update({ _id: '5ce3c94f0e259e7370966c63', 'visits_online._id': mongoose.Types.ObjectId('5ce5031ae8ee2e83b9ab23ff') },
        {
            $pull: { 'visits_online._id': mongoose.Types.ObjectId('5ce5031ae8ee2e83b9ab23ff') },
            $push: { visits: mongoose.Types.ObjectId('5ce5031ae8ee2e83b9ab23ff') },
        })