ColdFusion & MongoDB 4 using Java Driver 3.8 - mongodb

Question

I am trying to perform a wildcard search in Mongo using ColdFusion 11 & The Java MongoDB driver 3.8 on MongoDB 4.0.
The following code gives me errors saying that the method countDocuments() cannot be found or the method find() cannot be found.
<cfset Mongo = CreateObject("java","com.mongodb.MongoClient").init("localhost")>
<cffunction name="m" returntype="any">
<cfargument name="value" type="any">
<cfif IsJSON(arguments.value)>
<cfset local.retrun = CreateObject("java","com.mongodb.util.JSON").parse(arguments.value)>
<cfelse>
<cfset local.retrun = CreateObject("java","com.mongodb.util.JSON").parse( SerializeJSON(arguments.value) )>
</cfif>
<cfreturn local.retrun>
</cffunction>
<cfset db = Mongo.getDatabase('fda')>
<cfset DrugInfo = db.getCollection("druginfo")>
<cfset searchCount=druginfo.countDocuments(m({'openfda.brand_name':/Ty/ }))>
<cfset results = DrugInfo.find(m({'openfda.brand_name': /Ty/})).iterator()>
When attempting to do an exact match search, everything works fine.
<cfset searchCount=druginfo.countDocuments(m({'openfda.brand_name':'Tylenol'}))>
<cfset results = DrugInfo.find(m({'openfda.brand_name': 'Tylenol'})).iterator()>
I'm basically testing all my queries in Mongo Compass and pasting them into my code but it's not coming working as expected.

Answer 1

That error message is not very descriptive.
The Java driver won't take regex'es (or at least not via ColdFusion objects) like Compass does, so you'll have to $regex with the pattern between quotes like:
{ <field>: { $regex: 'pattern', $options: '<options>' } }
For example instead of
m({'openfda.brand_name':/Ty/ })
use
m({ 'openfda.brand_name': { '$regex': '^Ty', '$options': 'i' } })
There is more about how to use $regex here:
(https://docs.mongodb.com/manual/reference/operator/query/regex/)
I hope this helps.