Laravel 8 自定义登录：将邮箱更改为使用用户名认证

// database/migrations/xxxx_xx_xx_xxxxxx_create_users_table.php
Schema::create('users', function (Blueprint $table) {
    $table->id();
    $table->string('name')->nullable()->unique(); // 确保 'name' 字段存在且唯一
    // ... 其他字段
    $table->string('password');
    $table->rememberToken();
    $table->timestamps();
});

// app/Models/User.php
namespace App\Models;

use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
use Laravel\Sanctum\HasApiTokens;

class User extends Authenticatable
{
    use HasApiTokens, HasFactory, Notifiable;

    protected $fillable = [
        'name', // 确保 'name' 字段在这里
        'password',
        // ... 其他可填充字段
    ];

    protected $hidden = [
        'password',
        'remember_token',
    ];
}

// app/Http/Controllers/Auth/LoginController.php
namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use App\Providers\RouteServiceProvider;
use Illuminate\Foundation\Auth\AuthenticatesUsers;

class LoginController extends Controller
{
    use AuthenticatesUsers;

    protected $redirectTo = RouteServiceProvider::HOME;

    public function __construct()
    {
        $this->middleware('guest')->except('logout');
    }

    /**
     * Get the login username to be used by the controller.
     *
     * @return string
     */
    public function username()
    {
        return 'name'; // 将默认的 'email' 修改为 'name'
    }
}

<!-- resources/views/auth/login.blade.php -->
<form method="POST" action="{{ route('login') }}">
    @csrf

    <div class="form-group row">
        <label for="name" class="col-md-4 col-form-label text-md-right">{{ __('Username') }}</label>

        <div class="col-md-6">
            <input id="name" type="text" class="form-control @error('name') is-invalid @enderror" name="name" value="{{ old('name') }}" required autocomplete="name" autofocus>

            @error('name')
                <span class="invalid-feedback" role="alert">
                    <strong>{{ $message }}</strong>
                </span>
            @enderror
        </div>
    </div>

    <div class="form-group row">
        <label for="password" class="col-md-4 col-form-label text-md-right">{{ __('Password') }}</label>
        <div class="col-md-6">
            <input id="password" type="password" class="form-control @error('password') is-invalid @enderror" name="password" required autocomplete="current-password">
            @error('password')
                <span class="invalid-feedback" role="alert">
                    <strong>{{ $message }}</strong>
                </span>
            @enderror
        </div>
    </div>

    <!-- ... 其他表单元素 -->
</form>

<!-- resources/views/auth/register.blade.php -->
<form method="POST" action="{{ route('register') }}">
    @csrf

    <div class="form-group row">
        <label for="name" class="col-md-4 col-form-label text-md-right">{{ __('Username') }}</label>

        <div class="col-md-6">
            <input id="name" type="text" class="form-control @error('name') is-invalid @enderror" name="name" value="{{ old('name') }}" required autocomplete="name" autofocus>

            @error('name')
                <span class="invalid-feedback" role="alert">
                    <strong>{{ $message }}</strong>
                </span>
            @enderror
        </div>
    </div>

    <!-- ... 其他注册字段，包括密码 -->
</form>