Laravel Eloquent Relationship: Polymorphic Relations

Aktivitas.php

<?php

// app/models/Aktivitas.php

/**
 * Class Aktivitas
 */
class Aktivitas extends Eloquent {

    /**
     * set timestamps to false
     *
     * @var boolean
     */
    public $timestamps = false;

    /**
     * The database table used by the model.
     *
     * @var string
     */
    protected $table = 'aktivitas';

    /**
     * relasi dengan tabel komentar
     *
     * @return \Illuminate\Database\Eloquent\Relations\MorphMany
     */
    public function komentar()
    {
        return $this->morphMany('Komentar', 'commentable');
    }

}

DatabaseSeeder.php

<?php

// app/database/seeds/DatabaseSeeder.php

/**
 * Class DatabaseSeeder
 */
class DatabaseSeeder extends Seeder {

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

        DB::statement('SET FOREIGN_KEY_CHECKS = 0'); // disable foreign key constraints

        $this->call('TabelStatusSeeder');
        $this->call('TabelAktivitasSeeder');
        $this->call('TabelKomentarSeeder');

        DB::statement('SET FOREIGN_KEY_CHECKS = 1'); // enable foreign key constraints
    }

}

Komentar.php

<?php

// app/models/Komentar.php

/**
 * Class Komentar
 */
class Komentar extends Eloquent {

    /**
     * set timestamps to false
     *
     * @var boolean
     */
    public $timestamps = false;

    /**
     * The database table used by the model.
     *
     * @var string
     */
    protected $table = 'komentar';

    /**
     * relasi dengan tabel status & aktivitas
     *
     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
     */
    public function commentable()
    {
        return $this->morphTo();
    }

}

Status.php

<?php

// app/models/Status.php

/**
 * Class Status
 */
class Status extends Eloquent {

    /**
     * set timestamps to false
     *
     * @var boolean
     */
    public $timestamps = false;

    /**
     * The database table used by the model.
     *
     * @var string
     */
    protected $table = 'status';

    /**
     * relasi dengan tabel komentar
     *
     * @return \Illuminate\Database\Eloquent\Relations\MorphMany
     */
    public function komentar()
    {
        return $this->morphMany('Komentar', 'commentable');
    }

}

tabel_aktivitas.php

<?php

// app/database/migrations/tabel_aktivitas.php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;

/**
 * Class TabelAktivitas
 */
class TabelAktivitas extends Migration {

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('aktivitas', function (Blueprint $table)
        {
            $table->increments('id');
            $table->string('isi');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('aktivitas');
    }

}

tabel_komentar.php

<?php

// app/database/migrations/tabel_komentar.php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;

/**
 * Class TabelKomentar
 */
class TabelKomentar extends Migration {

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('komentar', function (Blueprint $table)
        {
            $table->increments('id');
            $table->string('isi');
            $table->integer('commentable_id');
            $table->string('commentable_type');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('komentar');
    }

}

tabel_status.php

<?php

// app/database/migrations/tabel_status.php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;

/**
 * Class TabelStatus
 */
class TabelStatus extends Migration {

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('status', function (Blueprint $table)
        {
            $table->increments('id');
            $table->string('isi');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('status');
    }

}

TabelAktivitasSeeder.php

<?php

// app/database/seeds/TabelAktivitasSeeder.php

/**
 * Class TabelAktivitasSeeder
 */
class TabelAktivitasSeeder extends Seeder {

    public function run()
    {
        Aktivitas::truncate();

        Aktivitas::create([
            'isi' => 'Isi aktivitas.'
        ]);
    }

}

TabelKomentarSeeder.php

<?php

// app/database/seeds/TabelKomentarSeeder.php

/**
 * Class TabelKomentarSeeder
 */
class TabelKomentarSeeder extends Seeder {

    public function run()
    {
        Komentar::truncate();

        Komentar::create([
            'isi'              => 'Isi komentar status.',
            'commentable_id'   => 1,
            'commentable_type' => 'Status'
        ]);

        Komentar::create([
            'isi'              => 'Isi komentar aktivitas.',
            'commentable_id'   => 1,
            'commentable_type' => 'Aktivitas'
        ]);
    }

}

TabelStatusSeeder.php

<?php

// app/database/seeds/TabelStatusSeeder.php

/**
 * Class TabelStatusSeeder
 */
class TabelStatusSeeder extends Seeder {

    public function run()
    {
        Status::truncate();

        Status::create([
            'isi' => 'Isi status.'
        ]);
    }

}