spring - Error during use $within operator with $elemMatch -


i'm using spring-data-mongodb (version 1.0.2.release) , mongodb (version 2.2). have object contain list of object location. classes following:

public class {  @id private objectid id;  private list<location> places;  //getter , setter }    public class place {  private string name;  private string description;  @geospatialindexed private double[] location;  //getter , setter }

i need find objects specific location. tried use operators $within , $elemmatch following:

@query(value = "{'places' : { $elemmatch: { location: {'$within' : {'$center' : [?0, ?1]} } }}}") public list<a> findbylocation(point location, double radius);

when run query, receive following exception:

org.springframework.data.mongodb.uncategorizedmongodbexception: can't find special index: 2d for: { places: { $elemmatch: { location: { $within: { $center: [ { x: 41.904159, y: 12.549132 }, 0.07000000000000001 ] } } } } }; nested exception com.mongodb.mongoexception: can't find special index: 2d for: { places: { $elemmatch: { location: { $within: { $center: [ { x: 41.904159, y: 12.549132 }, 0.07000000000000001 ] } } } } }

any suggestions?

regards

apparently there's no 2d index on location attribute, , mongodb requires such index present. don't know if spring should creating index itself, if doesn't, can create index via

db.collection.ensureindex({"location":"2d"})

where collection replaced name of collection.


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