How to add limit in find function in mongo_api call

[shiva6318]

Hi,

iam trying to get only two documents from mongodb using mongo_api:find/4 by adding limit to get the result but it is not working.

Key = #{<<"$query">> => #{<<"asset_id">> => Device_id,<<"packet_type">> => #{<<"$in">> => [<<"live">>,<<"historymod">>]},<<"packet_time">> => #{<<"$lte">> => PacketTime}},<<"$limit">> => #{<<"limit">> => 2},<<"$orderby">> => #{<<"packet_time">> => -1}},
mongo_api:find(hhd_mongopool_v2,?COLLECTION_TRACK, Key, #{}).

i have tried all possible way to add limit some are show below

1. <<"$limit">> => #{<<"limit">> => 2}
2. #{<<"limit">> => 2}
3. #{<<"$limit">> => 2}
4. <<"$limit">> => 2
5. <<"limit">> => 2

i have tried to use batchsize also but not working . can anyone please help in this query to add limit