Update result sorting

Author: DariusIII

app/Services/Search/Drivers/ElasticSearchDriver.php

@@ -2911,6 +2911,7 @@ public function searchReleasesFiltered(array $criteria, int $limit, int $offset
                         'query' => $query,
                         'sort' => [
                             [$sortField => ['order' => $order]],
+                            ['id' => ['order' => $order]],
                         ],
                         'from' => max(0, $offset),
                         'size' => max(1, min($limit, self::MAX_RESULTS)),

app/Services/Search/Drivers/ManticoreSearchDriver.php

@@ -2430,7 +2430,12 @@ public function searchReleasesFiltered(array $criteria, int $limit, int $offset
             if (! in_array($sortField, $allowedSort, true)) {
                 $sortField = 'postdate_ts';
             }
-            $query->sort($sortField, $sortDir === 'asc' ? 'asc' : 'desc');
+            $order = $sortDir === 'asc' ? 'asc' : 'desc';
+            $query->sort($sortField, $order);
+            if ($sortField !== 'id') {
+                // Stabilize ordering across pages when primary sort values are equal.
+                $query->sort('id', $order);
+            }
 
             $maxNeed = max(1000, $offset + $limit + 100);
             $query->maxMatches(min($maxNeed, (int) ($this->config['max_matches'] ?? 10000)));

tests/Unit/ManticoreSearchQueryTest.php

@@ -207,4 +207,22 @@ public function it_clamps_search_limit_to_configured_max_matches(): void
         $this->assertSame(500, $method->invoke($driver, 750));
         $this->assertSame(1, $method->invoke($driver, 0));
     }
+
+    #[Test]
+    public function search_releases_filtered_uses_stable_id_tiebreak_sort_for_manticore(): void
+    {
+        $driverSource = file_get_contents(__DIR__.'/../../app/Services/Search/Drivers/ManticoreSearchDriver.php');
+
+        $this->assertIsString($driverSource);
+        $this->assertStringContainsString("\$query->sort('id', \$order);", $driverSource);
+    }
+
+    #[Test]
+    public function search_releases_filtered_uses_stable_id_tiebreak_sort_for_elasticsearch(): void
+    {
+        $driverSource = file_get_contents(__DIR__.'/../../app/Services/Search/Drivers/ElasticSearchDriver.php');
+
+        $this->assertIsString($driverSource);
+        $this->assertStringContainsString("['id' => ['order' => \$order]],", $driverSource);
+    }
 }