Added a fix for the query filter

Author: JanHolger

src/main/java/org/javawebstack/orm/filter/DefaultQueryFilter.java

@@ -27,11 +27,15 @@ public void filter(Query<? extends Model> query, Map<String, String> filter) {
             filter.forEach((key, v) -> {
                 if(!filterable.containsKey(key))
                     key = Helper.toCamelCase(key);
-                if(!filterable.containsKey(key))
+                if(!filterable.containsKey(key)) {
+                    System.out.println("Filterable not found: " + key);
                     return;
+                }
                 Field field = info.getField(filterable.get(key));
-                if(field == null)
+                if(field == null) {
+                    System.out.println("Field null!");
                     return;
+                }
                 if(v.equals("null")) {
                     q.whereNull(key);
                     return;