Use model factory for data filling in laravel

• Generate a data table (all lessons are used as a demonstration in this case)

php artisan make:migration create_lessons_table

• Modify the field properties in the table

  • Add fields in the migration file (e.g. database / migrations / {time} _create_lessons_table.php)

  <?php
  use Illuminate\Database\Migrations\Migration;
  use Illuminate\Database\Schema\Blueprint;
  use Illuminate\Support\Facades\Schema;
  
  class CreateLessonsTable extends Migration
  {
     /**
      * Run the migrations.
      *
      * @return void
      */
     public function up()
     {
         Schema::create('lessons', function (Blueprint $table) {
             $table->id();
             $table->string('title');
             $table->text('body');
             $table->boolean('free');
             $table->timestamps();
         });
     }
  
     /**
      * Reverse the migrations.
      *
      * @return void
      */
     public function down()
     {
         Schema::dropIfExists('lessons');
     }
  }
  

• Perform database migration

  php artisan migrate

• Create data using a model factory

  • Create model factory class file

  php artisan make:factory LessonFactory

  <?php
  
   /** @var \Illuminate\Database\Eloquent\Factory $factory */
   
   use App\Models\Lesson;
   use Faker\Generator as Faker;
   
   $factory->define(Lesson::class, function (Faker $faker) {
       return [
           'title' => $faker->title,
           'body' => $faker->paragraph,
           'free' => $faker->boolean()
       ];
   });
  

  注:在上面一定要引入对应的模型文件

• Generate Seeder file

  php artisan make:seeder LessonsTableSeeder

  <?php
  
    use Illuminate\Database\Seeder;
    use App\Models\Lesson;
    
    class LessonsTableSeeder extends Seeder
    {
        /**
         * Run the database seeds.
         *
         * @return void
         */
        public function run()
        {
            $lessons = factory(Lesson::class)->times(30)->make();
            Lesson::insert($lessons->toArray());
        }
    }
    // 执行数据填充的时候会运行run方法中的内容
    // times(个数)为要填充的数据个数
    // make()是生成数据
    // insert()中插入的数据格式必须是数组,所以用toArray()转换为数组格式
  

• Data input

  Artisan db PHP: the SEED
  PHP Artisan db: = LessonsTableSeeder specify the SEED --class filled Seeder
  PHP Artisan the migrate: Fresh --seed delete all the tables and all of the re-migration, can be used to reconstruct the database