fix: not returning all the results

src/BookSearch/BookSearch.php

@@ -83,7 +83,7 @@ class BookSearch
 
         if($queryField == 'mediaType' and $queryText=='noCDS'){
             $queryText='-mediaType:CDS';
-        } else if (strlen($queryField) > 0) {
+        } else if (isset($queryField) && strlen($queryField) > 0) {
             $queryText = sprintf('%s:"%s"', $queryField, $queryText);
         }
 
@@ -104,6 +104,10 @@ class BookSearch
         $this->filterQueryParts[] = sprintf('%s:[%s TO %s]', $field, $min, $max);
     }
 
+    public function getQuery() {
+        return $this->query;
+    }
+
     public function addSortField($field, $order = \SolrQuery::ORDER_DESC)
     {
         $this->query->addSortField($field, $order);
@@ -175,6 +179,7 @@ class BookSearch
         $books = array();
         if(isset($results['response']['docs']) && is_array($results['response']['docs'])) {
             foreach($results['response']['docs'] as $r) {
+                if (!isset($r['id'])) continue;
                 $books[$r['id']] = $r;
             }
         }
@@ -280,24 +285,35 @@ class BookSearch
      * @throws WebException
      */
     public static function getBooks(array $codes, $field = 'code') {
-        // it is faster to do multiple small request to Solr rather than one big so separate
-        // in chunks if we are above the limit. 15 was found by testing and seems to be a sweet spot
         $limit = 15;
-        $count = count($codes);
-        if($count > $limit) {
-            $parts = array_chunk($codes, $limit);
-            $books = array();
-            foreach($parts as $p) {
-                // if we use array_merge here the numerical keys (book code) will be lost
-                $books += self::getBooks($p, $field);
+        $bs = self::getLastInstance();
+        $books = [];
+        foreach (array_chunk($codes, $limit) as $chunk) {
+            // Reset query state for this chunk
+            $bs->clearQueryParts();
+            $bs->addOrQuery($chunk, $field);
+            // Use count($chunk) so you only request as many rows as there are codes in this chunk
+            $results = $bs->getResults(0, count($chunk));
+            $books += $results['books'];
         }
         return $books;
     }
 
+    public function clearQueryParts(): void {
+        $this->queryParts = [];
+        $this->filterQueryParts = [];
+    }
+
+    /**
+     *
+     * it is faster to do multiple small request to Solr rather than one big so
+     * check self::getBooks(array $codes, $field = 'code') for a chunked request
+     * in chunks if we are above the limit. 15 was found by testing and seems to be a sweet spot
+     */
+    public static function getBooksFull(array $codes, $field = 'code') {
         $bs = self::getLastInstance();
         $bs->addOrQuery($codes, $field);
-
-        $results = $bs->getResults(0, $count);
+        $results = $bs->getResults(0, count($codes));
         return $results['books'];
     }