}
			loaded[elemKey] = true

			fieldValues := make([]interface{}, len(fields))
			notZero = false
			for idx, field := range fields {
				fieldValues[idx], zero = field.ValueOf(ctx, elem)
				notZero = notZero || !zero
			}

			if notZero {
				dataKey := utils.ToStringKey(fieldValues...)
				if _, ok := dataResults[dataKey]; !ok {
					results = append(results, fieldValues)

		}

		if len(bytes) > 0 {
			err = json.Unmarshal(bytes, fieldValue.Interface())
		}
	}

	field.ReflectValueOf(ctx, dst).Set(fieldValue.Elem())
	return
}

// Value implements serializer interface
func (JSONSerializer) Value(ctx context.Context, field *Field, dst reflect.Value, fieldValue interface{}) (interface{}, error) {
	result, err := json.Marshal(fieldValue)
	if string(result) == "null" {

		err = fmt.Errorf("unsupported data %#v", dbValue)
	}
	return err
}

func (c *CustomSerializer) Value(ctx context.Context, field *schema.Field, dst reflect.Value, fieldValue interface{}) (interface{}, error) {
	return fmt.Sprintf("%s%s", c.prefix, fieldValue), nil
}

func TestSerializer(t *testing.T) {
	schema.RegisterSerializer("custom", NewCustomSerializer("hello"))