changing field in a set object in mongodb

Question

I have this document in mongo:

{
    id: objectId,
    list: [ 
    {
        id: internalObjectId1,
        enabled: true
    },
    {
        id: internalObjectId2,
        enabled: false
    }]
}

I need to change the enabled field. How can I do it?

here some confusion don't understand you want to change enabled key to other key name or enabled value true to convert false. — Neo-coder
– Neo-coder, Commented Apr 1, 2015 at 12:11

chridam · Accepted Answer · 2015-04-01 12:24:58Z

1

Use the positional $ operator. Suppose you have the following document in the collection whose list element value is an array of embedded documents:

{
    "_id" : ObjectId("551be1a04db8a16ac729432e"),
    "list" : [ 
        {
            "id" : ObjectId("54f43159c922ac0b4387ef9c"),
            "enabled" : true
        }, 
        {
            "id" : ObjectId("54f43159c922ac0b4387ef9d"),
            "enabled" : false
        }
    ]
}

The following will update the value of the enabled field in the embedded document with the id of 54f43159c922ac0b4387ef9d to true:

db.collection.update(
   { 
        "_id": ObjectId("551be1a04db8a16ac729432e"), 
       "list.id": ObjectId("54f43159c922ac0b4387ef9d") 
   },
   { 
       "$set": {"list.$.enabled": true} 
   }
)

answered Apr 1, 2015 at 12:24

chridam

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