Fixed #9430 - make next audit date sortable

database/migrations/2026_07_30_000001_add_next_audit_date_index_to_assets.php

@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Speeds up two query paths that sort/filter on assets.next_audit_date:
+ *
+ *   - Audit report sort (#9430) via Actionlog::scopeOrderByAssetNextAuditDate,
+ *     which leftJoins assets on the polymorphic item_id/item_type and
+ *     orders by next_audit_date. Without an index, larger installs
+ *     filesort the entire filtered set per paged click.
+ *   - SendUpcomingAuditReport's dueOrOverdueForAudit scope, which
+ *     filters assets by next_audit_date within a window. Runs
+ *     nightly via the scheduler; on installs with 100k+ assets the
+ *     full-scan cost showed up in slow-query logs.
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('assets', function (Blueprint $table) {
+            $table->index('next_audit_date', 'assets_next_audit_date_index');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('assets', function (Blueprint $table) {
+            $table->dropIndex('assets_next_audit_date_index');
+        });
+    }
+};