laravel admin 后台配置总结
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composer 安装 encore/laravel-admin
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地址：https://packagist.org/packages/encore/laravel-admin
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中文文档：http://laravel-admin.org/docs/#/
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命令：
composer require encore/laravel-admin
php artisan vendor:publish --provider="Encore\Admin\AdminServiceProvider"
php artisan admin:install
注意：mysql 数据需要MySql 5.5.3以上，支持utf8mb4，安装第三步骤会报错：
[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
解决方法就是：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(){
Schema::defaultStringLength(191);
}
最后后台地址：http://localhost/admin 用户名：admin 密码：admin
生成admin下controller
php artisan admin:make ArticleController –model=App\\Model\\Article