How to query with Dates in Aggregate functions in mongodb - mongodb

Question

I'm using Metabase v0.41 and writing query to Cosmos DB as a mongoDb.
Metabase only allows execution of db.collection.aggregate, and I first want a match stage that does a basic string match and date range.
In SQL it'd be something like this:
SELECT *
FROM TABLE
WHERE TABLE.COLUMN = 'WORD' AND TABLE.CREATEDAT > DATE_ADD(NOW(), INTERVAL -1 DAY)
and this is what I have for the equivalent mongo query.
So here are several attempts that I tried in the match query
1)
{
$and: [
{
column: {$eq: "word" }
},
{
createdAt:{$lt : //new ISODate()
{
$dateAdd:{
startDate: new ISODate(),
unit: "day",
amount: -1
}
}
}
}
]
}
-> doesn't work even on mongo compass,this returns no results even if there are matching records in the database. but no syntax error either.
Subtract the difference in millisec
{
$and: [
{
column: {$eq: "word" }
},
{
createdAt:{$lt :new ISODate() -1231312321}
}
]
}
-> this does work on mongo compass, but not on Metabase.
the parser on the Metabase doesn't parse the number properly.
"JSON reader was expecting a name but found '-1231312321'."
I tried the subtraction using $subtract but still doesn't work.
Have any ideas?

Answer 1

Try
{ $expr:
{ $lt: [
"$createdAt",
{
$dateSubtract:{
startDate: "$$NOW",
unit: "day",
amount: 1
}
}]
}
}