Boolean filters don't work

[bergice]

Issue

It seems like this module is unable to filter using the ORM on boolean fields unless you pass an int to the filter.
This is the error that is triggered when passing a boolean:

SilverStripe\ORM\Connect\DatabaseException: Couldn't run query:
SELECT DISTINCT "LoginSession"."ClassName", "LoginSession"."LastEdited", "LoginSession"."Created", "LoginSession"."LastAccessed", "LoginSession"."IPAddress", "LoginSession"."UserAgent", "LoginSession"."Persistent", "LoginSession"."MemberID", "LoginSession"."ID", 
			CASE WHEN "LoginSession"."ClassName" IS NOT NULL THEN "LoginSession"."ClassName"
			ELSE  E'SilverStripe\\SessionManager\\Model\\LoginSession' END AS "RecordClassName"
FROM "LoginSession"
WHERE ("LoginSession"."LastAccessed" < $1)
 AND ("LoginSession"."Persistent" = $2)
ORDER BY "LoginSession"."LastAccessed" DESC
ERROR:  invalid input syntax for integer: ""

Failing travis build: https://travis-ci.com/github/silverstripe/silverstripe-session-manager/jobs/482489500

Steps to Replicate

1. Use PostgreSQL with SilverStripe
2. Execute the following code somewhere on a DataObject with a boolean column:

MyDataObject::get()->filter([
    'MyBooleanDBField' => true
]);

Expected Outcome

Booleans can be used with ORM filtering.

Version

2.3.1

Related issues

• https://stackoverflow.com/questions/35229253/silverstripe-sql-boolean-value-syntax-error

[maxime-rainville]

Actually, filtering for true works fine for me. It's only false that throws a fit.