Issue #11

CHANGELOG.md

+# Version 1.0.2
+
+* Fixed bug #11 (Fatal error clone on non object)
+
 # Version 1.0.1
 
 Initial release.
\ No newline at end of file

Civi/DataProcessor/FilterHandler/AbstractFieldFilterHandler.php

@@ -39,6 +39,13 @@ abstract class AbstractFieldFilterHandler extends AbstractFilterHandler {
     if (!$this->dataSource) {
       throw new DataSourceNotFoundException(E::ts("Filter %1 requires data source '%2' which could not be found. Did you rename or deleted the data source?", array(1=>$this->title, 2=>$datasource_name)));
     }
+    if (!$this->dataSource->getAvailableFilterFields()->getFieldSpecificationByName($field_name)) {
+      throw new FieldNotFoundException(E::ts("Filter %1 requires a field with the name '%2' in the data source '%3'. Did you change the data source type?", array(
+        1 => $this->title,
+        2 => $field_name,
+        3 => $datasource_name
+      )));
+    }
     $this->fieldSpecification  =  clone $this->dataSource->getAvailableFilterFields()->getFieldSpecificationByName($field_name);
     if (!$this->fieldSpecification) {
       throw new FieldNotFoundException(E::ts("Filter %1 requires a field with the name '%2' in the data source '%3'. Did you change the data source type?", array(