Entries should use their origin's value in search indexes where appropriate. Closes #2789

Author: jasonvarga

src/Search/Searchables.php

@@ -159,7 +159,11 @@ public function fields($searchable): array
         $transformers = $this->index->config()['transformers'] ?? [];
 
         return collect($fields)->mapWithKeys(function ($field) use ($searchable) {
-            $value = method_exists($searchable, $field) ? $searchable->{$field}() : $searchable->get($field);
+            if (method_exists($searchable, $field)) {
+                $value = $searchable->{$field}();
+            } else {
+                $value = $searchable instanceof EntryContract ? $searchable->value($field) : $searchable->get($field);
+            }
 
             return [$field => $value];
         })->flatMap(function ($value, $field) use ($transformers) {