用户登录角色选择功能实现教程

// 在 users 表中添加 selected_role_id 字段
Schema::table('users', function (Blueprint $table) {
    $table->unsignedBigInteger('selected_role_id')->nullable();
    $table->foreign('selected_role_id')->references('id')->on('roles'); // 假设 roles 表的主键是 id
});

// 在 LoginController 中修改 authenticated 方法

use Illuminate\Support\Facades\Auth;
use App\Models\User;

protected function authenticated(Request $request, $user)
{
    $roles = $user->getRoleNames(); // 获取用户所有角色名称

    if ($roles->count() > 1) {
        // 跳转到角色选择页面，并传递角色列表
        return redirect()->route('role.select')->with('roles', $roles);
    } else {
        // 如果只有一个角色，则直接登录
        return redirect()->intended($this->redirectPath());
    }
}

// routes/web.php
Route::get('/role/select', [RoleController::class, 'showSelectForm'])->name('role.select');
Route::post('/role/select', [RoleController::class, 'selectRole'])->name('role.select.post');

// app/Http/Controllers/RoleController.php

use Illuminate\Http\Request;
use App\Models\User;
use Spatie\Permission\Models\Role;
use Illuminate\Support\Facades\Auth;

class RoleController extends Controller
{
    public function showSelectForm(Request $request)
    {
        $roles = $request->session()->get('roles');
        return view('auth.role_select', compact('roles'));
    }

    public function selectRole(Request $request)
    {
        $request->validate([
            'role' => 'required|string',
        ]);

        $roleName = $request->input('role');
        $user = Auth::user();
        $role = Role::where('name', $roleName)->first();

        if ($role) {
            // 更新用户的 selected_role_id
            $user->selected_role_id = $role->id;
            $user->save();

            // 清除之前的角色和权限，然后赋予新的角色权限
            $user->syncRoles([$roleName]);

            return redirect()->intended('/home'); // 跳转到首页
        } else {
            return back()->withErrors(['role' => 'Invalid role selected.']);
        }
    }
}

// resources/views/auth/role_select.blade.php
@extends('layouts.app')

@section('content')
<div class="container">
    <div class="row justify-content-center">
        <div class="col-md-8">
            <div class="card">
                <div class="card-header">{{ __('Select Your Role') }}</div>

                <div class="card-body">
                    <form method="POST" action="{{ route('role.select.post') }}">
                        @csrf

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

                            <div class="col-md-6">
                                <select id="role" class="form-control @error('role') is-invalid @enderror" name="role" required>
                                    <option value="">{{ __('Select a role') }}</option>
                                    @foreach ($roles as $role)
                                        <option value="{{ $role }}">{{ $role }}</option>
                                    @endforeach
                                </select>

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

                        <div class="form-group row mb-0">
                            <div class="col-md-8 offset-md-4">
                                <button type="submit" class="btn btn-primary">
                                    {{ __('Submit') }}
                                </button>
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>
@endsection

// app/Http/Middleware/CheckSelectedRole.php

namespace App\Http\Middleware;

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

class CheckSelectedRole
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle(Request $request, Closure $next)
    {
        $user = Auth::user();

        if (!$user->selected_role_id) {
            // 如果用户没有选择角色，则跳转到角色选择页面
            return redirect()->route('role.select');
        }

        // 验证用户是否拥有访问该路由的权限 (可以使用 spatie/laravel-permission 的 can 方法)
        // 例如:
        // if (!$user->hasPermissionTo('view-dashboard')) {
        //     abort(403, 'Unauthorized.');
        // }

        return $next($request);
    }
}

// 在 app/Http/Kernel.php 中注册中间件
protected $middlewareAliases = [
    // ...
    'check.role' => \App\Http\Middleware\CheckSelectedRole::class,
];

// 在路由中使用中间件
Route::get('/home', [HomeController::class, 'index'])->name('home')->middleware('check.role');