Merge pull request #137 from pedro-ribeiro/fixing_trailing_comma

Removing undefined's from filter arguments

Author: auser

lib/modules/database.js

@@ -96,7 +96,7 @@ class DatabaseQuery {
   }
 
   setFilter(name, ...args) {
-    this.filters[name] = args;
+    this.filters[name] = args.filter(n => n != undefined);
     return this.ref;
   }