Laravel 时间戳显示毫秒

You can't because the PHP PDO driver doesn't support fractional seconds in timestamps. A work around is to select the timestamp as a string instead so the PDO driver doesn't know its really a timestamp, simply by doing $query->selectRaw(DB::raw("CONCAT(my_date_column) as my_date_column")) however this means you can't use the default select for all fields so querying becomes a real pain. Also you need to override getDateFormat on the model.

// override to include micro seconds when dates are put into mysql.
protected function getDateFormat()
{
    return 'Y-m-d H:i:s.u';
}

最后在你的迁移而不是 nullableTimestamps 中，在 Schema 回调之外做:

DB::statement("ALTER TABLE `$tableName` ADD COLUMN created_at TIMESTAMP(3) NULL");