Laravel 5 Modell Factories Null Fehler

Question

Dies ist der Fehler, den ich erhalte, wenn ich versuche, eine Modellfabrik nur für mein Nachrichtenmodell zu verwenden. Andere Modellfabriken funktionieren einwandfrei, und ich habe dies in laravels FactoryBuilder auf die Methode applyStates zurückverfolgt, und es ist in der Tat null, ich weiß einfach nicht warum. Ich habe die Modellklasse definiert, ich habe die Tabelle erstellt, der Code in meiner Methode, um Seed-Daten für Nachrichten hinzuzufügen, funktioniert, aber dieser Fehler wird ausgelöst, nachdem der erste Datensatz eingefügt wurde, es aus dem Hinzufügen einer Reihe von Seed-Daten für mich.

[2016-12-23 20:24:04] local.ERROR: Symfony\Component\Debug\Exception\FatalThrowableError: Type error: Argument 1 passed to Illuminate\Database\Eloquent\FactoryBuilder::applyStates() must be of the type array, null given, called in /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/FactoryBuilder.php on line 168 in /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/FactoryBuilder.php:180 
Stack trace: 

- 0 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/FactoryBuilder.php(168): Illuminate\Database\Eloquent\FactoryBuilder->applyStates(NULL, Array) 
- 1 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php(2282): Illuminate\Database\Eloquent\FactoryBuilder->Illuminate\Database\Eloquent\{closure}() 
- 2 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/FactoryBuilder.php(170): Illuminate\Database\Eloquent\Model::unguarded(Object(Closure)) 
- 3 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/FactoryBuilder.php(143): Illuminate\Database\Eloquent\FactoryBuilder->makeInstance(Array) 
- 4 [internal function]: Illuminate\Database\Eloquent\FactoryBuilder->Illuminate\Database\Eloquent\{closure}(1) 
- 5 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/FactoryBuilder.php(144): array_map(Object(Closure), Array) 
- 6 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/FactoryBuilder.php(113): Illuminate\Database\Eloquent\FactoryBuilder->make(Array) 
- 7 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/database/seeds/MessagesTableSeeder.php(15): Illuminate\Database\Eloquent\FactoryBuilder->create() 
- 8 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Console/Seeds/SeedCommand.php(63): MessagesTableSeeder->run() 
- 9 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php(2288): Illuminate\Database\Console\Seeds\SeedCommand->Illuminate\Database\Console\Seeds\{closure}() 
- 10 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Database/Console/Seeds/SeedCommand.php(64): Illuminate\Database\Eloquent\Model::unguarded(Object(Closure)) 
- 11 [internal function]: Illuminate\Database\Console\Seeds\SeedCommand->fire() 
- 12 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Container/Container.php(508): call_user_func_array(Array, Array) 
- 13 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Console/Command.php(169): Illuminate\Container\Container->call(Array) 
- 14 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/symfony/console/Command/Command.php(254): Illuminate\Console\Command->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput)) 
- 15 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Console/Command.php(155): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput)) 
- 16 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/symfony/console/Application.php(821): Illuminate\Console\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput)) 
- 17 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/symfony/console/Application.php(187): Symfony\Component\Console\Application->doRunCommand(Object(Illuminate\Database\Console\Seeds\SeedCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput)) 
- 18 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/symfony/console/Application.php(118): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput)) 
- 19 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php(121): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput)) 
- 20 /Users/jcrawford/Dropbox/Work/RYNO/htdocs/artisan(35): Illuminate\Foundation\Console\Kernel->handle(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput)) 
- 21 {main} 

// Modellfabrik

$factory->define(Message::class, function(Faker\Generator $faker) { 
$userIds = User::all()->pluck('id')->toArray(); 
$postIds = Post::all()->pluck('id')->toArray(); 

$post = Post::find($faker->randomElement($postIds)); 

$user1 = User::find($faker->randomElement($userIds)); 
$user2 = User::find($faker->randomElement($userIds)); 

$message1 = new Message([ 
    'post_id' => $post->id, 
    'to_user_id' => $user1->id, 
    'from_user_id' => $user2->id, 
    'message' => $faker->sentence() 
]); 
$message1->save(); 

if(mt_rand(0,1) === 1) { 
    // add message reply 
    $message2 = new Message([ 
     'message_id' => $message1->id, 
     'post_id' => $post->id, 
     'to_user_id' => $user2->id, 
     'from_user_id' => $user1->id, 
     'message' => $faker->sentence() 
    ]); 

    $message2->save(); 
} 
}); 

// Mit Modellfabrik

<?php 

use Illuminate\Database\Seeder; 
use App\Models\Message; 

class MessagesTableSeeder extends Seeder 
{ 
    /** 
    * Run the database seeds. 
    * 
    * @return void 
    */ 
    public function run() 
    { 
     factory(Message::class, 200)->create(); 
    } 
} 

Answer 1

Sie den Fehler erhalten, weil ein Model Factory definition Bedürfnisse ein Array zurück, die Attribute des Modell-Instanz enthält, du erschaffst.

Mit Ihrem aktuellen Code Sie immer mit mindestens 1 oder schließlich 2 neuen Nachricht (wenn die mt_rand(0,1) auf true entsprechen) enden. Aber Ihr factory() Aufruf wird immer nach der ersten Ausführung fehlschlagen. Versuchen Sie folgendes:

Modellfabrik:

$factory->define(App\Message::class, function(Faker\Generator $faker) { 

    $userIds = App\User::all()->pluck('id')->toArray(); 
    $postIds = App\Post::all()->pluck('id')->toArray(); 
    $post = App\Post::find($faker->randomElement($postIds)); 
    $user1 = App\User::find($faker->randomElement($userIds)); 
    $user2 = App\User::find($faker->randomElement($userIds)); 

    return [ 
     'message_id' => null, // default NULL 
     'post_id' => $post->id, 
     'to_user_id' => $user1->id, 
     'from_user_id' => $user2->id, 
     'message' => $faker->sentence() 
    ]; 
}); 

MessagesTableSeeder:

class MessagesTableSeeder extends Seeder 
{ 
    /** 
    * Run the database seeds. 
    * 
    * @return void 
    */ 
    public function run() 
    { 
     factory(App\Message::class, 200) 
      ->create() 
      ->each(function ($m) { 
       if(mt_rand(0,1) === 1) { 
        factory(App\Message::class) 
         ->create([ 
          'message_id' => $m->id, // Overrides NULL attribute 
          'post_id' => $m->post_id, // Ensures same post 
          'to_user_id' => $m->from_user_id, // Switch from & to from relation 
          'from_user_id' => $m->to_user_id, 
         ]); 
       } 
      }); 
    } 
}