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Laravel 5.4 migrate报错:Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter table `users` add unique `us ers_email_unique`(`email`))

时间：2021-07-01 10:21:17 帮助过：14人阅读

function up() { Schema::create(‘users‘, function (Blueprint $table) { $table->increments(‘id‘); $table->string(‘name‘); $table->string(‘email‘)->unique(); $table->string(‘password‘); $table->rememberToken(); $table->timestamps(); }); }

以上是user表的migartion，可以看出name字段并没有声明长度，laravel默认了1071，而报错中看出数据库设置了最大是767，所以就报错了

Laravel 5.4默认使用utf8mb4字符编码，而不是之前的utf8编码。mb4的最大字符长度为4个字节，解决方法是：

手动配置迁移命令migrate生成的默认字符串长度，在AppServiceProvider中调用Schema::defaultStringLength方法来实现配置：

use Illuminate\Support\Facades\Schema;

/**
* Bootstrap any application services.
*
* @return void
*/
public function boot()
{
   //     767/4  
   Schema::defaultStringLength(191);
}

Laravel 5.4 migrate报错:Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter table `users` add unique `us ers_email_unique`(`email`))

标签：实现 span boot art nbsp spec byte 而不是 print

Laravel 5.4 migrate报错:Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter table `users` add unique `us ers_email_unique`(`email`))

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