Find between two string date ranges in spring mongodb

iCurious :

I have Document Person like

{
  "_id": {
    "$oid": "5e44659dcd"
  },
  "record": {
    "Date_Of_Birth": "9/25/2018"
  },
  "_class": "com.example.entities.Birth"
}

Record is of type object, Date_Of_Birth is of type String but Date has been stored in it and I want to execute query to use $gte and $lte operations on that. I am using spring data mongodb. It seems first I have to use $dateFromString to convert it to date, But this seems to be aggregation which I don't think I require.

Below is the code which I have created so far

Pageable pageable = PageRequest.of(page, size);
Query query = new Query(
        Criteria
                .where("record.Date_Of_Birth").gte(DateOperators.dateFromString(startDate).withFormat("mm/dd/yyyy"))
                .andOperator(Criteria.where("record.Date_Of_Birth").lte(DateOperators.dateFromString(endDate).withFormat("mm/dd/yyyy"))
)).with(pageable);

which generates this query

{ "record.Date_Of_Birth" : { "$gte" : { "value" : { "dateString" : "9/25/2018", "format" : "mm/dd/yyyy"}}}, "$and" : [{ "record.Date_Of_Birth" : { "$lte" : { "value" : { "dateString" : "9/25/2018", "format" : "mm/dd/yyyy"}}}}]}

and is not working at all. Any idea?

Joe :

$expr permits using aggregation operators inside the query. This will permit you to convert the stored value to a date so you can do an apples to apples comparison.

db.collection.find({
  $expr: {
    $gte: [
      {$dateFromString: {
           dateString: "$record.Date_Of_Birth", 
           format: "%m/%d/%Y", 
           timeZone: "EST5EDT"}},
      {$dateFromString: {
           dateString: "9/25/2018", 
           format: "%m/%d/%Y", 
           timeZone: "EST5EDT"}}
    ]
  }
})