Laravel 8数据库填充报错：类未找到与Trait缺失问题求助

Hey there! Let's work through those two errors you're hitting with your Laravel 8 database seeding. I'll break down each issue and show you how to fix them:

1. Fixing "Class 'Database\Seeders\App\Models\Admin' not found" #

The root cause here is the namespace context in your AdminsTableSeeder. Since the seeder lives under the Database\Seeders namespace, when you write App\Models\Admin::create(), PHP tries to look for the class at Database\Seeders\App\Models\Admin—which doesn't exist.

You have two solid fixes for this:

• Option 1: Import the Admin class at the top of your seeder
  Add a use statement for the Admin model so you can reference it directly:

  <?php
  namespace Database\Seeders;
  
  use Illuminate\Database\Seeder;
  use DB;
  use App\Models\Admin; // Add this line
  
  class AdminsTableSeeder extends Seeder {
      public function run() {
          DB::table('admins')->delete();
          $adminRecords = [
              [
                  'id'=>1,
                  'name'=>'admin',
                  'type'=>'admin',
                  'email'=>'admin@admin.com',
                  'password'=>'',
                  'image'=>'',
                  'status'=>1,
              ],
          ];
          foreach ($adminRecords as $key => $record){
              Admin::create($record); // Now this works!
          }
      }
  }
  

• Option 2: Use the root namespace prefix
  If you prefer not to add the use statement, prefix the class path with a backslash to tell PHP to look from the root namespace:

  \App\Models\Admin::create($record);
  

2. Fixing "Trait 'Illuminate\Notification\Notifiable' not found" #

This one's a simple typo in your model's namespace reference! In Laravel 8, the Notifiable trait lives under the plural Notifications namespace, not the singular Notification.

Update your App/Models/Admin.php model:

<?php
namespace App\Models;

use Illuminate\Notifications\Notifiable; // Change Notification to Notifications
use Illuminate\Foundation\Auth\User as Authenticatable;
// use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Admin extends Authenticatable {
    use Notifiable;
    protected $guard = 'admin';
    protected $fillable = [
        'name', 'type','email','password','image','status','created_at','updated_at',
    ];
    protected $hidden = [
        'password', 'remember_token',
    ];
}

Final Steps to Verify #

1. Save all your modified files
2. Run composer dump-autoload (or composer du as you did before) to refresh the autoloader
3. Execute your seeder with:

   php artisan db:seed
   # Or target the specific seeder directly:
   php artisan db:seed --class=AdminsTableSeeder
   

Quick Bonus Tip #

Your password field in $adminRecords is empty—don't forget to hash it using Laravel's Hash facade! Update that line like this (and add the import to your seeder):

// In your AdminsTableSeeder, add this import:
use Illuminate\Support\Facades\Hash;

// Then update the password line:
'password' => Hash::make('your-secure-password'),

内容的提问来源于stack exchange，提问作者Agustine