Update logic for tracking a server's transfer state

database/migrations/2020_12_14_013707_make_successful_nullable_in_server_transfers.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class MakeSuccessfulNullableInServerTransfers extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('server_transfers', function (Blueprint $table) {
+            $table->boolean('successful')->nullable()->default(null)->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('server_transfers', function (Blueprint $table) {
+            $table->boolean('successful')->default(0)->change();
+        });
+    }
+}