How to extract NumberLong data from Mongodb using Node.js?

Question

I am using Node.js and tried to store the timestamp data in the Mongodb Database with the folowing code:

`articleProvider.saveUser({
        userID : user,
        email : email,
        address : "",
        time : new Date().getTime(),
        },function(error,userData){
                if(!userData){ callback(error);}
                else{ callback(null,userData);}
            });
        }
    });`

And the data stored in the Database is (from mongo shell):

{ "userID" : "hem", "email" : "[email protected]", "address" : "Kathmandu", "time" : NumberLong("1320911838254"), "_id" : ObjectId("4ebb83dea7dd40990e000002") }

BUT if I retrieve the data in node.js console the output becomes :

{ userID: 'hem',
  email: '[email protected]',
  address: 'Kathmandu',
  time: { low_: -1938088914, high_: 307 },
  _id: 4ebb83dea7dd40990e000002 }

Now My Question is How to Retrieve this value of field "time" with NumberLong data?

It gives the output with two different fields of "low_" and "high_". But, I want the output only "1320911838254" .

Can Anyone Help me?

Thanks for the response. But I tried to get the number using

var value = new Long(low_bits, high_bits).toNumber();

as Mr. Lycha had posted, but in Node.js Platform it shows an error "Long is not defined" as :

var value = new Long(user.time.low_, user.time.high_).toNumber();

ReferenceError: Long is not defined
at /home/developer/Desktop/Express/app.js:65:1
at /home/developer/Desktop/Express/public/js/processData.js:76:10
at /home/developer/Desktop/Express/public/js/dbQuery.js:196:16
at [object Object].<anonymous> (/home/developer/node_modules/mongodb/lib/mongodb/collection.js:743:5)
at [object Object].emit (events.js:67:17)
at [object Object].<anonymous> (/home/developer/node_modules/mongodb/lib/mongodb/connections/server.js:97:12)
at [object Object].emit (events.js:64:17)
at Socket.<anonymous> (/home/developer/node_modules/mongodb/lib/mongodb/connection.js:161:16)
at Socket.emit (events.js:64:17)
at Socket._onReadable (net.js:678:14)

How to get the long parser in node.js? Any Idea?

And thanks strada for response. But how to store as dateObject in Mongodb? The DataType is itself defined. Is there any method to change the Datatype in Mongodb? And How to Parse it?

stema · Accepted Answer · 2011-12-20 06:51:09Z

3

I have found the best solution after the long practice :

articleProvider.saveUser({
    userID : user,
    email : email,
    address : "",
    time : new Date().getTime().toString(),
    },function(error,userData){
            if(!userData){ callback(error);}
            else{ callback(null,userData);}
        });
    }
});

Store the date object as the string object using "toString()" and after the query change the string object into the integer value using "parseInt()".

I think this is really easy and good solution.

edited Dec 20, 2011 at 6:51

stema

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answered Dec 20, 2011 at 6:36

Hem Shrestha

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Comments

Lycha · Accepted Answer · 2011-11-10 17:01:23Z

1

MongoDB stores the number as 64bit-object but javascript doesn't support that, that's why they have to have the _low and _high. You can get the number like this:

var value = new Long(low_bits, high_bits).toNumber();

Read here for more. You should consider using the date object instead.

answered Nov 10, 2011 at 17:01

Lycha

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1 Comment

Yuval A. Over a year ago

I'm trying to do that in the Mongo Shell in Compass, and I get: Long is not defined

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