update solr index

app/Library/Search/SolariumDocument.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Library\Search;
+
+use App\Models\Dataset;
+use Solarium\QueryType\Update\Query\Document\Document;
+
+class SolariumDocument extends SolrDocumentXslt
+{
+    public function __construct($options)
+    {
+        parent::__construct($options);
+    }
+    
+    public function toSolrUpdateDocument(Dataset $rdrDataset, Document $solrDoc)
+    {
+        if (!($solrDoc instanceof Document)) {
+            throw new \Exception('provided Solr document must be instance of Solarium Update Document');
+        }
+        
+        // convert Opus document to Solr XML document for supporting custom transformations
+        $solrDomDoc = parent::toSolrDocument($rdrDataset, new \DomDocument());
+        
+        // read back fields from generated Solr XML document
+        $solrXmlDoc = simplexml_import_dom($solrDomDoc)->doc[0];
+
+        $solrDoc->clear();
+        foreach ($solrXmlDoc->field as $field) {
+            $solrDoc->addField(strval($field['name']), strval($field));
+        }
+
+        return $solrDoc;
+    }
+}