我正在 Laravel 应用程序中工作，并将users表格与posts表格逐user_id列相关联。我已经user_id在表中有列了posts。但是当我运行php artisan db:seed命令时，出现错误：`SQLSTATE[42S22]：未找到列：1054“字段列表”中的未知列“user_id”出现以下错误：   Illuminate\Database\QueryException   SQLSTATE[42S22]: Column not found: 1054 Unknown column 'user_id ' in 'field list' (SQL: insert into `posts` (`user_id `, `title`, `post_image`, `content`, `user_id`, `updated_at`, `created_at`) values (11, Perferendis dolorem eum ex nesciunt., https://lorempixel.com/900/300/?54025, Unde voluptatibus praesentium unde et illum qui quo. Cupiditate pariatur aperiam fugiat perspiciatis. In atque corrupti eius ipsam saepe blanditiis minima., 1, 2020-06-28 08:54:02, 2020-06-28 08:54:02))  at vendor/laravel/framework/src/Illuminate/Database/Connection.php:671    667|         // If an exception occurs when attempting to run a query, we'll format the error    668|         // message to include the bindings with SQL, which will make this exception a    669|         // lot more helpful to the developer instead of just the database's errors.    670|         catch (Exception $e) {  > 671|             throw new QueryException(    672|                 $query, $this->prepareBindings($bindings), $e    673|             );    674|         }    675|   • A column was not found: You might have forgotten to run your migrations. You can run your migrations using `php artisan migrate`.     https://laravel.com/docs/master/migrations#running-migrations      +13 vendor frames   14  database/seeds/DatabaseSeeder.php:21      Illuminate\Database\Eloquent\Relations\HasOneOrMany::save()      +1 vendor frames   16  database/seeds/DatabaseSeeder.php:22      Illuminate\Support\Collection::each()