DynamoDB FilterExpressions with BETWEEN - node.js

Question

I am performing a scan operation on my DynamoDB table then filtering the result to have items between two dates in NODE.js
The DynamoDB table formats data like this:
{
TableName: tableName,
Item: {
"visitorID": visitorIDq, // Primary Key
"dateID": dateTime, // What I am filtering the scan for
"visitorName": "END OF Q",
"employeeName": "END OF Q",
"comments": "END OF Q"
}
Current code:
var date1 = String(threeMonths); // milliseconds since epoch - 3 months in milliseconds
var date2 = String(dateTime); // milliseconds since epoch aka now
var params2 = {
TableName: tableName,
FilterExpression: "dateID BETWEEN :date1 and :date2",
ExpressionAttributeValues: {
":date1": { "S": date1},
":date2": { "S": date2}
}
};
I am getting this error:
ERROR Unable to scan the table. Error JSON: { "message": "Invalid
FilterExpression: Incorrect operand type for operator or function;
operator or function: BETWEEN, operand type: M", "code":
"ValidationException", "time": "2019-07-06T02:00:44.569Z",
"requestId": "REQUESTID1294743204701HHH443", "statusCode": 400,
"retryable": false, "retryDelay": 26.7865000058784 }
After some internet searching I am kind of stuck, not really find anybody else with this issue in node. Any ideas?
For some reason Stack Overflow is telling me this is mostly code. I thought I did a pretty good job of explaining it and giving details. This is placeholder text because I am tryna post. It is still happening. Details. Details. Details.

Answer 1

The correct resolution:
var dateID = String("\""+ threeMonths + "\""); // var for time in milliseconds, stringifying
var params2 = {
ExpressionAttributeValues: {
':msID' : dateID
},
FilterExpression: "dateID >= :msID", // dateID column in DDB is greater than epoch - 3 months
TableName: "Visitor"
};
JSON.stringify(params2); //params are stringified here for the scan
Specifically:
ExpressionAttributeValues: {
':msID' : "15666767546459" // or whatever value you are comparing, the above resolution has dateID there because its a var getting current time
}