=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/DefaultQueryParser.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/DefaultQueryParser.java	2016-01-04 02:27:49 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/DefaultQueryParser.java	2016-01-08 16:26:00 +0000
@@ -194,11 +194,11 @@
             }
             case "in":
             {
-                return Restrictions.in( path, QueryUtils.getValue( Collection.class, arg ) );
+                return Restrictions.in( path, QueryUtils.getValue( Collection.class, property.getKlass(), arg ) );
             }
             case "!in":
             {
-                return Restrictions.notIn( path, QueryUtils.getValue( Collection.class, arg ) );
+                return Restrictions.notIn( path, QueryUtils.getValue( Collection.class, property.getKlass(), arg ) );
             }
             case "null":
             {

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/QueryUtils.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/QueryUtils.java	2016-01-04 02:27:49 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/QueryUtils.java	2016-01-08 16:26:00 +0000
@@ -33,8 +33,10 @@
 import com.google.common.collect.Lists;
 import org.hisp.dhis.system.util.DateUtils;
 
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Date;
+import java.util.List;
 
 /**
  * @author Morten Olav Hansen <mortenoh@gmail.com>
@@ -44,6 +46,12 @@
     @SuppressWarnings( { "rawtypes", "unchecked" } )
     static public <T> T getValue( Class<T> klass, Object objectValue )
     {
+        return getValue( klass, null, objectValue );
+    }
+
+    @SuppressWarnings( { "rawtypes", "unchecked" } )
+    static public <T> T getValue( Class<T> klass, Class<?> secondaryKlass, Object objectValue )
+    {
         if ( klass.isInstance( objectValue ) )
         {
             return (T) objectValue;
@@ -117,7 +125,26 @@
             }
 
             String[] split = value.substring( 1, value.length() - 1 ).split( "," );
-            return (T) Lists.newArrayList( split );
+            List<String> items = Lists.newArrayList( split );
+
+            if ( secondaryKlass != null )
+            {
+                List<Object> convertedList = new ArrayList<>();
+
+                for ( String item : items )
+                {
+                    Object convertedValue = getValue( secondaryKlass, null, item );
+
+                    if ( convertedValue != null )
+                    {
+                        convertedList.add( convertedValue );
+                    }
+                }
+
+                return (T) convertedList;
+            }
+
+            return (T) items;
         }
 
         return null;

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/operators/InOperator.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/operators/InOperator.java	2016-01-04 02:27:49 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/operators/InOperator.java	2016-01-08 16:26:00 +0000
@@ -50,7 +50,7 @@
     @Override
     public Criterion getHibernateCriterion( Property property )
     {
-        return Restrictions.in( property.getFieldName(), getValue( Collection.class, args.get( 0 ) ) );
+        return Restrictions.in( property.getFieldName(), getValue( Collection.class, property.getKlass(), args.get( 0 ) ) );
     }
 
     @Override
@@ -115,9 +115,10 @@
         }
         else if ( type.isEnum() )
         {
+            String s1 = String.valueOf( item );
             String s2 = String.valueOf( object );
 
-            return item != null && s2.equals( item );
+            return s1 != null && s2.equals( s1 );
         }
 
         return false;

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/operators/Operator.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/operators/Operator.java	2016-01-04 02:27:49 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/query/operators/Operator.java	2016-01-08 16:26:00 +0000
@@ -73,9 +73,14 @@
         return args;
     }
 
+    protected <T> T getValue( Class<T> klass, Class<?> secondaryClass, int idx )
+    {
+        return QueryUtils.getValue( klass, secondaryClass, args.get( idx ) );
+    }
+
     protected <T> T getValue( Class<T> klass, int idx )
     {
-        return QueryUtils.getValue( klass, args.get( idx ) );
+        return QueryUtils.getValue( klass, null, args.get( idx ) );
     }
 
     protected <T> T getValue( Class<T> klass )
@@ -83,6 +88,11 @@
         return getValue( klass, 0 );
     }
 
+    protected <T> T getValue( Class<T> klass, Class<?> secondaryClass, Object value )
+    {
+        return QueryUtils.getValue( klass, secondaryClass, value );
+    }
+
     protected <T> T getValue( Class<T> klass, Object value )
     {
         return QueryUtils.getValue( klass, value );