db: add User has one AdminRole relation

database/migrations/2020_09_25_021109_create_admin_roles_table.php

@@ -14,7 +14,7 @@ class CreateAdminRolesTable extends Migration
     public function up()
     {
         Schema::create('admin_roles', function (Blueprint $table) {
-            $table->integer('id')->unsigned();
+            $table->increments('id');
             $table->string('name', 64);
             $table->string('description', 255)->nullable();
             $table->integer('sort_id');

database/migrations/2021_01_16_201057_add_admin_role_id_column_to_users_table.php

@@ -29,7 +29,6 @@ class AddAdminRoleIdColumnToUsersTable extends Migration
     {
         Schema::table('users', function (Blueprint $table) {
             $table->dropForeign(['admin_role_id']);
-            $table->dropIndex('admin_role_id');
             $table->dropColumn('admin_role_id');
         });
     }