mongodb - Mongo Aggregation $filter on ISO date value -

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i have following document

{   "_id": "57b4c5f0291ebb13110b888e",   "first": "john",   "last": "smith",   "email": "john.smith@gmail.com",   "fulfillments": [     {       "_id": "57b683e531a5a21679b78e6d",       "created_by_name": "john smith",       "created_by_id": "57b4c5f0291ebb23110b888e",       "fulfilled_by_name": "john smith",       "fulfilled_by_id": "57b4c5f0291ebb13110b888e",       "date": new date("2016-08-23t13:58:15-0700")     }   ] }

for have mongo query want return list of fulfillments have not occured. means date property on fulfillment embedded document greater current time.

db.users.aggregate([     { $match : { "_id" : "57b4c5f0291ebb13110b888e" } },     { $project : {             "fulfillments" : {                 $filter : {                     "input" : "$fulfillments",                     "as" : "item",                     "cond" : ...something here filter on 'date'                 }             }         }     },     { $unwind : "$fulfillments" },     { $project : {             "created_by_name" : "$fulfillments.created_by_name",             "created_by_id" : "$fulfillments.created_by_id",             "fulfilled_by_name" : "$fulfillments.fulfilled_by_name",             "fulfilled_by_id" : "$fulfillments.fulfilled_by_id",             "date" : "$fulfillments.date"         }     } ])

i can't figure out proper way filter on fulfillments date has not occured.

the following should give desired result

... $project : {     "fulfillments" : {         $filter : {             "input" : "$fulfillments",             "as" : "item",             "cond" : { $gt: [ "$$item.date", new date() ] }         }     } } ...

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