laravel - 未找到“播种机”类

Question

我已经创建了迁移并将它们迁移到数据库。现在准备创建播种机，但php artisan db:seed给出了这个错误Class 'Seeder' not found。

如何创建播种机类以及它存储在哪里？

我正在关注本教程https://scotch.io/tutorials/a-guide-to-using-eloquent-orm-in-laravel并且正处于我们“用关系播种数据库”的地步。

这是我的DatabaseSeeder.php

// app/database/seeds/DatabaseSeeder.php
<?php

use App\Bear;
use App\Tree;
use App\Fish;
use App\Picnic;
use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{

    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        Eloquent::unguard();

        // call our class and run our seeds
        $this->call('BearAppSeeder');
        $this->command->info('Bear app seeds finished.'); // show information in the command line after everything is run
    }
}

// our own seeder class
// usually this would be its own file
class BearAppSeeder extends Seeder
{

    public function run()
    {

        // clear our database ------------------------------------------
        DB::table('bears')->delete();
        DB::table('fish')->delete();
        DB::table('picnics')->delete();
        DB::table('trees')->delete();
        DB::table('bears_picnics')->delete();

        // seed our bears table -----------------------
        // we'll create three different bears

        // bear 1 is named Lawly. She is extremely dangerous. Especially when hungry.
        $bearLawly = Bear::create(array(
            'name'         => 'Lawly',
            'type'         => 'Grizzly',
            'danger_level' => 8
        ));

        // bear 2 is named Cerms. He has a loud growl but is pretty much harmless.
        $bearCerms = Bear::create(array(
            'name'         => 'Cerms',
            'type'         => 'Black',
            'danger_level' => 4
        ));

        // bear 3 is named Adobot. He is a polar bear. He drinks vodka.
        $bearAdobot = Bear::create(array(
            'name'         => 'Adobot',
            'type'         => 'Polar',
            'danger_level' => 3
        ));

        $this->command->info('The bears are alive!');

        // seed our fish table ------------------------
        // our fish wont have names... because theyre going to be eaten

        // we will use the variables we used to create the bears to get their id

        Fish::create(array(
            'weight'  => 5,
            'bear_id' => $bearLawly->id
        ));
        Fish::create(array(
            'weight'  => 12,
            'bear_id' => $bearCerms->id
        ));
        Fish::create(array(
            'weight'  => 4,
            'bear_id' => $bearAdobot->id
        ));

        $this->command->info('They are eating fish!');

        // seed our trees table ---------------------
        Tree::create(array(
            'type'    => 'Redwood',
            'age'     => 500,
            'bear_id' => $bearLawly->id
        ));
        Tree::create(array(
            'type'    => 'Oak',
            'age'     => 400,
            'bear_id' => $bearLawly->id
        ));

        $this->command->info('Climb bears! Be free!');

        // seed our picnics table ---------------------

        // we will create one picnic and apply all bears to this one picnic
        $picnicYellowstone = Picnic::create(array(
            'name'        => 'Yellowstone',
            'taste_level' => 6
        ));
        $picnicGrandCanyon = Picnic::create(array(
            'name'        => 'Grand Canyon',
            'taste_level' => 5
        ));

        // link our bears to picnics ---------------------
        // for our purposes we'll just add all bears to both picnics for our many to many relationship
        $bearLawly->picnics()->attach($picnicYellowstone->id);
        $bearLawly->picnics()->attach($picnicGrandCanyon->id);

        $bearCerms->picnics()->attach($picnicYellowstone->id);
        $bearCerms->picnics()->attach($picnicGrandCanyon->id);

        $bearAdobot->picnics()->attach($picnicYellowstone->id);
        $bearAdobot->picnics()->attach($picnicGrandCanyon->id);

        $this->command->info('They are terrorizing picnics!');
    }
}

收到错误后，我尝试添加一个名为Seeder.php并添加以下内容的模型：

// app/models/seeder.php
<?php

class Seeder extends Seeder
{

    protected $fillable = [];
    protected $table = 'bear';
}

我已经尝试了在这里找到的所有答案，但也composer dump-autoload没有快乐。

标签： laravel

Answer 1

您需要确保导入Seeder 您的类扩展的 Illuminate 类

use App\Bear;
use App\Tree;
use App\Fish;
use App\Picnic;
use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
// Rest of code

在您的班级中名列前茅