Added Search API integration for chado fields :-)

tripal_chado/tripal_chado.module

@@ -32,7 +32,7 @@ tripal_chado_set_globals();
  * This function is used to set the global Chado variables
  *
  * @ingroup tripal_chado
-*/
+ */
 function tripal_chado_set_globals() {
   // these global variables are meant to be accessed by all Tripal
   // modules to find the chado version installed and if Chado is local.
@@ -993,7 +993,7 @@ function tripal_chado_add_bundle_base_fields($entity_type_name, $bundle_name, $b
     }
 
     // If we don't have a field type then we don't need to create a field.
-    if (!$field_info['field_type']) { http://www.phytozome.net/citrus.php
+    if (!$field_info['field_type']) {
       // If we don't have a field type but it is required and doesn't have
       // a default value then we are in trouble.
       if ($field_info['is_required'] and !array_key_exists('default', $details)) {
@@ -1286,3 +1286,67 @@ function tripal_chado_describe_args($callback, $args) {
   return $new_args;
 }
 
+/**
+ * Implements hook_entity_property_info_alter().
+ *
+ * This is being implemented to ensure chado fields are exposed for search api indexing.
+ * All fields are available for index by default but the getter function set by default
+ * is not actually capable of getting the value from chado. Thus we change the getter
+ * function to one that can :-).
+ */
+function tripal_chado_entity_property_info_alter(&$info) {
+
+  // Get a list of fields with the chado storage backend.
+
+  // Loop through all of the bundles.
+  if (isset($info['TripalEntity']['bundles'])) {
+    foreach ($info['TripalEntity']['bundles'] as $bundle_id => $bundle) {
+      // Loop through each of the fields for a given bundle.
+      foreach ($bundle['properties'] as $field_name => $field_info) {
+        // If the field is a chado field, then change the callback.
+        // @todo check this properly.
+        if (preg_match('/(\w+)__(\w+)/', $field_name, $matches)) {
+          $info['TripalEntity']['bundles'][$bundle_id]['properties'][$field_name]['getter callback'] =
+            'tripal_chado_entity_property_get_value';
+        }
+      }
+    }
+  }
+
+}
+
+/**
+ * Provides a way for the search api to grab the value of a chado field.
+ *
+ * @param $entity
+ *   The fully-loaded entity object to be indexed.
+ * @param $options
+ *   Options that can be ued when retrieving the value.
+ * @param $field_name
+ *   The machine name of the field we want to retrieve.
+ * @param $entity_type
+ *   The type of entity (ie: TripalEntity).
+ *
+ * @return
+ *   The rendered value of the field specified by $field_name.
+ */
+function tripal_chado_entity_property_get_value($entity, $options, $field_name, $entity_type) {
+	
+	$display = array(
+		'type' => '',
+		'label' => 'hidden',
+	);
+
+	$langcode = LANGUAGE_NONE;
+	$items = field_get_items($entity_type, $entity, $field_name);
+	if (count($items) == 1) {
+		$render_array = field_view_value($entity_type, $entity, $field_name, $items[0], $display, $langcode);
+	}
+	// @todo: handle fields with multiple values.
+	else {
+		$render_array = field_view_value($entity_type, $entity, $field_name, $items[0], $display, $langcode);
+		drupal_set_message('Tripal Chado currently only supports views integration for single value fields. The first value has been shown.', 'warning');
+	}
+
+  return drupal_render($render_array);
+}