Date format in parameters doesn't work (MongoDB Query)

Issue Summary

When using date parameters in MongoDB query, we can’t use the date format, but only the number one (timestamp)

Steps to Reproduce

{
  "$match": {
     "_created_at": {
       "$gte": {
         "$date": "{{fromDate}}"
       },
       "$lt": {
         "$date": "{{toDate}}"
        }
       }
    }
}

[SebC99]

What works for me is using $ISODate:

"_created_at": {
   "$gte": "ISODate(\"{{ start }}\")"
}

[GaetanLhoest]

Hi, is there any update on this?

I would like as well to count events during the last hour, and made the following query:

{
    "collection": "live-providers",
    "aggregate": [{
        "$match": {
            "date": { 
                "$gt": "new ISODate(ISODate().getTime() - 1000 * 60 * 60)"
            }
        }
    } ,{
        "$group": {
            "_id": "$provider",
            "count1": {
                "$sum": "$insert"
            },
            "count2": {
                "$sum": "$delete"
            },
            "coun3t": {
                "$sum": "$updates"
            }
        }
    }, {
        "$sort": [{
            "name": "count1",
            "direction": 1
        }, {
            "name": "count2",
            "direction": -1
        }, {
            "name": "count3",
            "direction": -1
        }, {
            "name": "_id",
            "direction": -1
        }]
    }]
}

but it does not return anything, if I remove the $match section, it count on all the documents, and not only the last hour.