Finding a single row in MONGO DB driver java using _id field

Question

I am trying to get a single record using the _id field , here is my code

BasicDBObject query = new BasicDBObject("_id","52a6a2cc05e1c80fd5e9295c");

DBCursor cursor = blogTable.find(query);
while (cursor.hasNext())
{
    System.out.println("got u");
    dataText.setText((cursor.next().get("content:encoded")).toString());
}

I simple don't get any data and I am quite sure the id exist .please help

What happens when you print out just "cursor.next()"? Not sure if that will potentially show you the data or not. Are you getting "got u" to print? — Envin
– Envin, Commented Dec 10, 2013 at 19:00
Actually i got it I need to pass the object as it is and not convert it to string by using toString method Thanks anyway — Snedden27
– Snedden27, Commented Dec 10, 2013 at 19:05

Bob Kuhar · Accepted Answer · 2013-12-10 19:09:23Z

3

I'm guessing that the String you are calling out as "52a6a2cc05e1c80fd5e9295c" is actually an ObjectID in the MongoDB. If this is the case, your lookup is...

BasicDBObject query = new BasicDBObject();
query.put("_id", new ObjectId("52a6a2cc05e1c80fd5e9295c"));
DBObject dbo = blogTable.findOne(query);
if ( dbo != null ) {
    System.out.println( "got u " + dbo );
} else {
    System.out.println( "not found" );
}

You need to know the types of things in MongoDB.

answered Dec 10, 2013 at 19:09

Bob Kuhar

11.2k11 gold badges69 silver badges126 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Finding a single row in MONGO DB driver java using _id field

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related