添加 余额 索引

database/migrations/2023_02_02_193726_add_index_to_modules_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up(): void
+    {
+        Schema::table('modules', function (Blueprint $table) {
+            $table->index('balance');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down(): void
+    {
+        Schema::table('modules', function (Blueprint $table) {
+            $table->dropIndex('balance');
+        });
+    }
+};