php - How to get a specific object from array of objects inside specific MongoDB document? -

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there struct of mongodb documents:

{     _id : "12345",     name : "foo",     object : {         array_of_objects : [{             id : 507,             name : "some name",             dt : "2012-06-27 16:35:50"         },{             id : 506             name : "some other name",             dt : "2012-06-21 16:09:05"         },         …         ]     } }

i need object array_of_objects id of document specified name. use php , tried execute next code:

$collection->find(array('name' => 'foo', 'object.array_of_objects.id' => 507));

it returns elements of array_of_objects instead of element id 507. after try make query $elemmatch:

$collection->find(array('name' => 'foo', 'object.array_of_objects' => array('$elemmatch' => array('id' => 507))));

but had return same. :( mongodb version 2.0.6. please help.

this issue has been resolved , available in mongodb version 2.2, next stable release: https://jira.mongodb.org/browse/server-828

i tried using mongodb 2.1.2 (unstable, development release):

sample doc: 

{ "_id" : 1, "object" : { "array" : [ { "id" : 507, "name" : "jenna" }, { "id" : 506, "name" : "matt" } ] } }

query: 

db.food.find({_id:1, "object.array.id":506},{_id:0, "object.array.$":1})

result:

{ "object" : { "array" : [ { "id" : 506, "name" : "matt" } ] } }

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