在Laravel 5.4上使用php artisan make:auth迁移错误
[Illuminate\Database\QueryException] SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter tabl e 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
当前回答
对我来说很有魅力!
将此添加到config/database.php
'engine' => 'InnoDB ROW_FORMAT=DYNAMIC',
而不是
'engine' => 'null',
其他回答
这里的方法是传递一个带有键名的第二个参数(一个短参数):
$table->string('my_field_name')->unique(null,'key_name');
对于这个错误，我找到了两个解决方案
选项1:
打开database/migrations文件夹下的user和password_reset表
只需要改变邮件的长度:
$table->string('email',191)->unique();
选项2:
打开app/Providers/AppServiceProvider.php文件，在boot()方法中设置一个默认字符串长度:
use Illuminate\Support\Facades\Schema;
public function boot()
{
Schema::defaultStringLength(191);
}
打开这个文件:/app/Providers/AppServiceProvider.php
并将此代码更新为我的图像:
use Illuminate\Support\Facades\Schema;
public function boot()
{
Schema::defaultStringLength(191);
}
如前所述，我们在App/Providers中添加到AppServiceProvider.php
use Illuminate\Support\Facades\Schema; // add this
/**
* Bootstrap any application services.
*
* @return void
*/
public function boot()
{
Schema::defaultStringLength(191); // also this line
}
你可以在下面的链接中看到更多细节(搜索“索引长度& MySQL / MariaDB”) https://laravel.com/docs/5.5/migrations
BUT WELL THAT's not what I published all about! the thing is even when doing the above you will likely to get another error (that's when you run php artisan migrate command and because of the problem of the length, the operation will likely stuck in the middle. solution is below, and the user table is likely created without the rest or not totally correctly) we need to roll back. the default roll back will not work. because the operation of migration didn't like finish. you need to delete the new created tables in the database manually.
我们可以这样做使用修补器如下所示:
L:\todos> php artisan tinker
Psy Shell v0.8.15 (PHP 7.1.10 — cli) by Justin Hileman
>>> Schema::drop('users')
=> null
我自己有一个问题与用户表。
之后你就可以开始了
PHP artisan migrate:回滚
PHP工匠迁移
尝试使用默认字符串长度125 (MySQL 8.0)。
defaultStringLength (125)
