MongoDB-推送或更新数组中的元素

Question

In products collection, i have an Array of recentviews which has 2 fields viewedBy & viewedDate .

I am on to $push a fresh element in Array, so i am using below query :-

db.produts.update( { _id: 'ObjectId("536c55bf9c8fb24c21000095")' },
                    { $push: { recentviews: [ { viewedby: 'xyz', vieweddate: ISODate("2014-05-09T04:12:47.907Z") } ] } }
            )

What is wrong in the above query?

Further If the record already exists for eg if there is already a record with viewedby : xyz , i need to update the record ie vieweddate .

Answer 1

{ _id: 'ObjectId("536c55bf9c8fb24c21000095")' } should be without quotes as with quotes it is treated as string instead of objectId, which is not equal to your primary key.

{ _id: ObjectId("536c55bf9c8fb24c21000095") }

x1:PRIMARY> typeof( 'ObjectId("536c55bf9c8fb24c21000095")' )
string
x1:PRIMARY> typeof( ObjectId("536c55bf9c8fb24c21000095") )
object

Answer 2

You don't need to specify the brackets [] :

db.produts.update( 
    { _id: ObjectId("536c55bf9c8fb24c21000095") },
    { 
        "$push": { 
            "recentviews": { 
                "viewedby": "xyz",
                "vieweddate": ISODate("2014-05-09T04:12:47.907Z")
            } 
        }
    }
)

So when adding a new sub-document to an array it is just specified that way and added to the array that is mentioned on the left side.

Also your ObjectId value was quoted which would have stopped the .update() from matching.