db.requests.aggregate([
    {$match:{
           "hospital":ObjectId("555cfce9d599f0f12c000007"),
           "materials.products.attended.consumed":{$exists:true}
        }
    },
    {$unwind:"$materials"},
    {$unwind:"$materials.products"},
    {$unwind:"$materials.products.attended"},
    {$group:
        {
            "_id":{"antel_code":"$materials.products.antel_code", "name":"$materials.products.name"},
            "quantity_to_restore":{$sum:{$cond:[{$eq:["$materials.products.assign","LOCAL"]}, "$materials.products.attended.consumed", 0]}},
            "data":{$push:{
                "folio":"$folio",
                //"consumed":"$materials.products.attended.consumed"
                "consumed":{$cond:["$materials.products.attended.consumed", "$materials.products.attended.consumed", null]}
                }
            }
        }
    },
    {$match:{"quantity_to_restore":{$gt:0}}},
    //{$match:{"data.consumed":{$ne:null}}},
    {$sort:{"_id.antel_code":1}}
]);