Laravel 8 登录后重定向到仪表盘：完整教程

<?php

namespace App\Http\Controllers\Auth;

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

class LoginController extends Controller
{
    use AuthenticatesUsers;

    /**
     * Where to redirect users after login.
     *
     * @var string
     */
    protected $redirectTo = '/dashboard'; // 或者 'dashboard'

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('guest')->except('logout');
    }
}

// 错误配置：guest:api 意味着只有未认证的API用户才能访问，这与仪表盘需求相悖
Route::group(['prefix' => 'dashboard','middleware' => 'guest:api'], function () {
    Route::get('/', 'HomeController@admin_index')->name('dashboard');
    // ... 其他仪表盘路由
});

<?php
// routes/site.php 或 routes/web.php

use App\Http\Controllers\HomeController;
use Illuminate\Support\Facades\Route;

// 确保已导入 Auth facades 或使用 Auth::routes();
// Auth::routes(); // 如果您使用Laravel UI等认证脚手架

Route::middleware(['auth'])->prefix('dashboard')->group(function () {
    Route::get('/', [HomeController::class, 'admin_index'])->name('dashboard');
    Route::get('add', 'manage@AddArticle')->name('addarticle');
    // ... 其他仪表盘路由
});

// 或者，如果您想为整个组使用控制器命名空间
// Route::middleware(['auth'])->namespace('App\Http\Controllers')->prefix('dashboard')->group(function () {
//     Route::get('/', 'HomeController@admin_index')->name('dashboard');
//     Route::get('add', 'manage@AddArticle')->name('addarticle');
//     // ... 其他仪表盘路由
// });

<?php

namespace App\Providers;

use Illuminate\Support\Facades\Route;
use Illuminate\Foundation\Support\Providers\RouteServiceProvider as ServiceProvider;

class RouteServiceProvider extends ServiceProvider
{
    // ...
    public const HOME = '/';
    public const DASH = '/dashboard'; // 定义仪表盘路径常量
    // ...
}

<?php

namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\AuthenticatesUsers;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Session;

class LoginController extends Controller
{
    use AuthenticatesUsers;

    /**
     * Where to redirect users after login.
     *
     * @var string
     */
    protected $redirectTo = '/dashboard'; // 仍然可以保留，作为备用或默认值

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('guest')->except('logout');
    }

    /**
     * Handle a login request to the application.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Http\Response|\Illuminate\Http\JsonResponse
     */
    public function login(Request $request)
    {
        // 1. 定义自定义验证消息
        $messages = [
            'email.required'    => '邮箱地址是必填项。',
            'password.required' => '密码是必填项。',
        ];

        // 2. 执行请求验证
        $this->validate($request, [
            'email' => 'required|email',
            'password' => 'required',
        ], $messages);

        // 3. 尝试进行用户认证
        // 可以添加额外的认证条件，例如 'status' 字段
        if (Auth::attempt(['email' => $request->email, 'password' => $request->password, 'status' => 1])) {
            // 4. 认证成功：设置 Flash 消息并重定向到仪表盘
            Session::flash('success', '欢迎回来，' . Auth::user()->name . '！');
            return redirect()->route('dashboard'); // 使用路由名称进行重定向更健壮
        } else {
            // 5. 认证失败：设置 Flash 错误消息并返回上一页
            Session::flash('error', '抱歉！请重试。您的登录凭据不正确或账户未激活。');
            return redirect()->back()->withInput($request->only('email')); // 保留邮箱输入
        }
    }
}

<?php

namespace App\Http\Middleware;

use Closure;
use App\Providers\RouteServiceProvider;
use Illuminate\Support\Facades\Auth;

class RedirectIfAuthenticated
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @param  string|null  $guard
     * @return mixed
     */
    public function handle($request, Closure $next, $guard = null)
    {
        if (Auth::guard($guard)->check()) {
            // 如果用户已登录，则重定向到 RouteServiceProvider::DASH
            return redirect(RouteServiceProvider::DASH);
        }
        return $next($request);
    }
}