MongoDB Compass 聚合 $match 过滤器返回 null

Question

I have collection in mongodb and its size is 5.7 million. But I have problem with the $match filter. I'm trying a query with this command:

{ date:{ $gte: "2019-07-16", $lte: "2019-07-16" } }

returns 10k documents.

But I'm trying $match aggregations with the same command and it returns nothing.

My sample document;

{
"_id":"5c1a231f1923047866f3ffb0",
"no":"20",
"id":"007",
"Typee":"Real",
"type":"noInternet",
"dealersTitle":"John",
"yesterday_total":"65.52",
"mastercard_number":"0",
"mastercard_total":"0",
"mastercard_balance":"0",
"rfCard_number":"6",
"rfCart_total":"65",
"rfBalance_number":"0",
"rfBalance_total":"0",
"todayBalance":"0.52",
"balanceRfTotal":"0",
"date":"2019-07-16"
}

I don't understand where the problem comes from.

Edited: It returns result when I try aggregation on terminal. Why Mongo Compass doesn't see my collection in the aggregation tab. (N/A Documents in the Collection)

Answer 1

Sample document shows that your date attribute is saved as string and not date.

{ "_id":"5c1a231f1923047866f3ffb0", "no":"20", "id":"007", "Typee":"Real", "type":"noInternet", "dealersTitle":"John", "yesterday_total":"65.52", "mastercard_number":"0", "mastercard_total":"0", "mastercard_balance":"0", "rfCard_number":"6", "rfCart_total":"65", "rfBalance_number":"0", "rfBalance_total":"0", "todayBalance":"0.52", "balanceRfTotal":"0", "date":"2019-07-16" }

if you use data type as date you can easily compare dates.

"date": {"$date":"2019-07-16"}