refactor 310 update listener

database/migrations/2020_05_12_154129_add_user_id_to_expenses_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddUserIdToExpensesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('expenses', function (Blueprint $table) {
+            $table->integer('user_id')->unsigned()->nullable();
+            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('expenses', function (Blueprint $table) {
+            $table->dropColumn('paid');
+        });
+    }
+}