Java MongoDb : Dot Notation

Question

{ "_id" : { "$oid" : "52568424036439f2c5107571"} , "start" : { "x:" : 71 , "y:" : 9} , "end" : { "x:" : 30 , "y:" : 84}}
{ "_id" : { "$oid" : "52568424036439f2c5107572"} , "start" : { "x:" : 28 , "y:" : 59} , "end" : { "x:" : 72 , "y:" : 64}}
{ "_id" : { "$oid" : "52568424036439f2c5107573"} , "start" : { "x:" : 16 , "y:" : 71} , "end" : { "x:" : 18 , "y:" : 79}}

Need all docs say where start.x > 40

Query tried mongoDb console :

db.lines.find({"start.x": {$gt:40} })

Java Driver:

DBObject query = QueryBuilder.start("start.x").greaterThan(50).get();
collection.find(query)

Both cases no error, no documents retrieved.

zero323 · Accepted Answer · 2013-10-10 10:49:50Z

2

You named your field x: not x so this should do the work:

db.lines.find({"start.x:": {$gt:40} })

answered Oct 10, 2013 at 10:49

zero323

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Roman Rdgz · Accepted Answer · 2013-10-10 10:50:50Z

1

Haven't used Mongo with Java, but... have you tried using QueryBuilder.get instead of QueryBuild.start? That's the method used for find operations.

You can also use a more specific one for this case: QueryBuild.greaterThan

answered Oct 10, 2013 at 10:50

Roman Rdgz

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