bulk update data in mongodb

Question

I have below data in stored in my db. The use case is the user can choose date and update the age or name in bulk. How will be the query look like?

[
    {
        date:'1-1-2016',
        users:[
            {
                'name':'james',
                'age':18
            },
            {
                'name':'alice',
                'age':20
            }
        ]
    },
    {
        date:'2-1-2016',
        users:[
            {
                'name':'james',
                'age':18
            },
            {
                'name':'alice',
                'age':20
            },
            {
                'name':'xiaomi',
                'age':29
            }
        ]
    }
]

I used this Users.update({date:'1-1-2016','user.name':'james'},{'$set':'users.$.age':5}}) but it's not bulk update, it only update single document.

Answer 1

You can set multi true option in mongodb update

ex. if you want to update multiple document use

Users.update({date:'1-1-2016','user.name':'james'},{'$set':'users.$.age':5}}, {multi:true})

but if there is many dates to match use

Users.update({date:{ $in: [ '1-1-2016','1-2-2016' ] },'user.name':'james'},{'$set':'users.$.age':5}}, {multi:true})

Answer 2

You can use updateMany . It is a special function for bulk update. Please note update is deprecated .