Laravel 5.4 made a change to the default database character set, and it’s now utf8mb4
which includes support for storing emojis. This only affects new applications and as long as you are running MySQL v5.7.7 and higher you do not need to do anything.
For those running MariaDB or older versions of MySQL you may hit this error when trying to run migrations:
[Illuminate\Database\QueryException]SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter table users
add unique users_email_unique
(email
))
[PDOException]SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes
As outlined in the Migrations guide to fix this all you have to do is edit your AppServiceProvider.php
file and inside the boot method set a default string length:
use Illuminate\Support\Facades\Schema;
public function boot()
{
Schema::defaultStringLength(191);
}
After that everything should work as normal.
但是對于 Laravel auth form 驗證字段很多都這樣寫：
protected function validator(array $data)
{
return Validator::make($data, [
'name' => 'required|string|max:255',
'email' => 'required|string|email|max:255|unique:users',
'password' => 'required|string|min:6|confirmed',
]);
}
我們需要把所有的 255 改為 191 苹享？ 修改默認字符串的長度顯然不是最佳的解決方案。
實際上這個問題出在 MySQL本身，對 MySQL 啟用 innodb_large_prefix 選項即可。
在 Debian 中過程如下：
- 創(chuàng)建單獨的配置文件
$ sudo touch /etc/mysql/conf.d/innodb_large_prefix.cnf
- 在配置文件中寫入如下內(nèi)容：
[mysqld]
# innodb settings
innodb_large_prefix=1
innodb_purge_threads=1
innodb_file_format = Barracuda
innodb_file_per_table = 1
- 重啟 MySQL
$ sudo systemctl restart mysql
