Add performance-improving indexes (#4278)

database/migrations/2017_10_20_234129_add_location_indices_to_assets.php

@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddLocationIndicesToAssets extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('assets', function (Blueprint $table) {
+            $table->index('rtd_location_id');
+            $table->index(['assigned_type','assigned_to']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('assets', function (Blueprint $table) {
+            //
+            $table->dropIndex(['rtd_location_id']);
+            $table->dropIndex(['assigned_type','assigned_to']);
+        });
+    }
+}