錯誤提示

In Connection.php line 664:

  SQLSTATE[42S01]: Base table or view already exists: 1050 Table 'users' already exists (SQL: create table `users`
  (`id` int unsigned not null auto_increment primary key, `name` varchar(191) not null, `email` varchar(191) not nu
  ll, `password` varchar(191) not null
 
, `remember_token` varchar(100) null, `created_at` timestamp null, `updated_a
  t` timestamp null) default character set utf8mb4 collate utf8mb4_unicode_ci)


In Connection.php line 458:

  SQLSTATE[42S01]: Base table or view already exists: 1050 Table 'users' already exists

實際的錯誤原因卻不是在這裡，而是我在上一步的時候就已經錯了。
上一步錯誤提示：

Migration table created successfully.

In Connection.php line 664:

  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`))


In Connection.php line 458:

  SQLSTATE[42000]: Syntax error
 
 or access violation: 1071 Specified key was too long; max key length is 767 bytes

上一步建立表時少建立了一個表，本來需要建立3個表，實際建立了兩個。忽略了錯誤。
下面再對資料庫進行操作時，就會提示這種錯誤。

解決辦法：

1. 將資料庫中的表全部刪除
2. 在AppServiceProvider.php中新增

use Illuminate\Support\Facades\Schema;

public function boot()
{
    Schema::defaultStringLength(191);
}

1. 重新執行php artisan migrate