laravel 实现多用户体系登录

laraveli添加一个或多个用户表，以admin为例。。
部分文件内容可能需要根据实际情况修改

创建一个Admin模型

php artisan make:model Admin -m

编写admins表字段

Schema::create('admins', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name')->unique();
    $table->string('password');
    $table->rememberToken();
    $table->timestamps();
});

编辑admin模型

<?php

namespace App;

use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;

/**
 * @property int $id
 * @property \Carbon\Carbon $created_at
 * @property \Carbon\Carbon $updated_at
 */
class Admin extends Authenticatable
{
    use Notifiable;
    protected $fillable = [
        'name', 'password','remember_token'
    ];
    protected $hidden = [
        'password','remember_token'
    ];
}

修改auth.php配置文件

'guards' => [
    ...
    'admin' => [
        'driver' => 'session',
        'provider' => 'admins'
    ]
],

'providers' => [
    ...
    'admins' => [
        'driver' => 'eloquent',
        'model' => App\Admin::class,
    ]
],

在app/Http/Controllers下创建目录Admin/Auth
在Admin目录下创建文件HomeController.php(这个文件用来测试登录成功后的跳转页面)

<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;

class HomeController extends Controller
{
    /**
     * HomeController constructor.
     */
    public function __construct()
    {
        $this->middleware('auth:admin');
    }

    /**
     * Show the application dashboard.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        return view('admin.home');
    }
}

使用命令生成一个Request

php artisan make:request AdminLoginRequest

此时在app/Http/Request目录下便生成了这个文件，然后编辑这个文件

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class AdminLoginRequest extends FormRequest
{
    /**
     * 确定用户是否有权发出此请求.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * 获取适用于请求的验证规则.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'name'     => 'required',
            'password' => ['required', 'min:6'] //密码必须，最小长度为6
        ];
    }
}

在Admin/Auth目录下创建文件LoginController.php

<?php

namespace App\Http\Controllers\Admin\Auth;

use App\Http\Controllers\Controller;
use App\Http\Requests\AdminLoginRequest;
use Illuminate\Support\Facades\Auth;

class LoginController extends Controller
{
    public function showLoginForm()
    {
        return view('admin.auth.login');
    }

    public function postLogin(AdminLoginRequest $loginRequest)
    {
        $data = $loginRequest->only('name', 'password');
        $result = Auth::guard('admin')->attempt($data, true);
        if ($result) {
            return redirect(route('admin.home'));
        } else {
            return redirect()->back()
                ->with('name', $loginRequest->get('name'))
                ->withErrors(['name' => '用户名或密码错误']);
        }
    }

    public function postLogout()
    {
        Auth::guard('admin')->logout();
        return redirect(route('admin.login.show'));
    }
}

添加路由。打开app/providers/RouteServiceProvider.php
在方法mapWebRoutes()方法后面增加一个方法

protected function mapAdminWebRoutes()
    {
        Route::middleware('web')
            ->prefix('admin')
            ->namespace($this->namespace)
            ->group(base_path('routes/admin.php'));
    }

在map()方法里调用上面增加的方法

public function map()
    {
        $this->mapApiRoutes();

        $this->mapAdminWebRoutes();//调用新增的方法

        $this->mapWebRoutes();
    }

在routes目录下增加一个路由文件admin.php

<?php
Route::get('login','Admin\Auth\LoginController@showLoginForm')
    ->middleware('guest:admin')
    ->name('admin.login.show');

Route::get('/','Admin\HomeController@index')
    ->name('admin.home');

Route::post('login','Admin\Auth\LoginController@postLogin')
    ->middleware('guest:admin')
    ->name('admin.login.post');

Route::post('logout','Admin\Auth\LoginController@postLogout')
    ->middleware('auth:admin')
    ->name('admin.logout');

把home.blade.php复制到resources/views/admin下
把layouts/app.blade.php复制为layouts/admin.blade.php，修改相应的地方

<ul class="nav navbar-nav navbar-right">
    <!-- Authentication Links -->
    @guest('admin')
        <li><a href="{{ route('admin.login.show') }}">admin Login</a></li>
    @else
    <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false" aria-haspopup="true">
            {{ Auth::guard('admin')->user()->name }} <span class="caret"></span>
        </a>

        <ul class="dropdown-menu">
            <li>
                <a href="{{ route('admin.logout') }}"
                    onclick="event.preventDefault();
                    document.getElementById('logout-form').submit();">
                    Logout
                </a>

                <form id="logout-form" action="{{ route('admin.logout') }}" method="POST" style="display: none;">
                    {{ csrf_field() }}
                </form>
            </li>
        </ul>
    </li>
    @endguest
</ul>

把login.blade.php复制到admin/Auth目录下

@extends('layouts.admin')

@section('content')
    <div class="container">
        <div class="row">
            <div class="col-md-8 col-md-offset-2">
                <div class="panel panel-default">
                    <div class="panel-heading">Admin Login</div>

                    <div class="panel-body">
                        <form class="form-horizontal" method="POST" action="{{ route('admin.login.post') }}">
                            {{ csrf_field() }}

                            <div class="form-group{{ $errors->has('name') ? ' has-error' : '' }}">
                                <label for="name" class="col-md-4 control-label">E-Mail Address</label>

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

                                    @if ($errors->has('name'))
                                        <span class="help-block">
                                        <strong>{{ $errors->first('name') }}</strong>
                                    </span>
                                    @endif
                                </div>
                            </div>

                            <div class="form-group{{ $errors->has('password') ? ' has-error' : '' }}">
                                <label for="password" class="col-md-4 control-label">Password</label>

                                <div class="col-md-6">
                                    <input id="password" type="password" class="form-control" name="password" required>

                                    @if ($errors->has('password'))
                                        <span class="help-block">
                                        <strong>{{ $errors->first('password') }}</strong>
                                    </span>
                                    @endif
                                </div>
                            </div>

                            <div class="form-group">
                                <div class="col-md-8 col-md-offset-4">
                                    <button type="submit" class="btn btn-primary">
                                        Login
                                    </button>
                                </div>
                            </div>
                        </form>
                    </div>
                </div>
            </div>
        </div>
    </div>
@endsection

数据填充

php artisan make:seed AdminsTableSeeder

编辑AdminsTableSeeder.php

public function run()
    {
        \App\Admin::insert([
            'name'=>'yzha5',
            'password'=> bcrypt('123456')
        ]);
    }

DatabaseSeeder.php

$this->call(AdminsTableSeeder::class);

文件上传至服务器，登入服务器，执行填充命令

php artisan migrate
php artisan db:seed

此时，直接打开http://xxx/admin并不会跳转到http://xxx/admin/login，因此需要处理一些异常。打开app/Exceptions/Handle.php
重写unauthenticated()方法。

use Illuminate\Support\Facades\Route;

protected function unauthenticated($request, AuthenticationException $exception)
    {
        return starts_with(Route::currentRouteName(), 'admin')
            ? redirect(route('admin.login.show'))
            : parent::unauthenticated($request, $exception);
    }

---

完善一下

以上代码，当admin登录后，再次访问/admin/login这个URI时，会自动跳转到/home这个URI，这是因为guest这个中间件默认跳转到了/home，也就是middleware目录下的RedirectIfAuthenticated.php这个文件。

解决方法为：
创建一个中单件，名为：RedirectIfAdminAuthenticated

php artisan make:middleware RedirectIfAdminAuthenticated

编辑这个文件：

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Support\Facades\Auth;

class RedirectIfAdminAuthenticated
{
    /**
     * Handle an incoming request.
     *
     * @param $request
     * @param Closure $next
     * @param null $guard
     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector|mixed
     */
    public function handle($request, Closure $next, $guard = null)
    {
        if (Auth::guard($guard)->check()) {
            return redirect('/admin');
        }

        return $next($request);
    }
}

在Kernel.php中添加一行

protected $routeMiddleware = [
        ...
        'admin.guest' => \App\Http\Middleware\RedirectIfAdminAuthenticated::class,
        ...
    ];

更改admin路由，将guest:admin改为admin.guest:admin

Route::get('login','Admin\Auth\LoginController@showLoginForm')
    ->middleware('admin.guest:admin')
    ->name('admin.login.show');
Route::post('login','Admin\Auth\LoginController@postLogin')
    ->middleware('admin.guest:admin')
    ->name('admin.login.post');