Laravel Eloquent Relationship: Has Many Through

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('TabelKabupatenSeeder');
        $this->call('TabelPendudukSeeder');
        $this->call('TabelDesaSeeder');

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

}

Desa.php

<?php

// app/models/Desa.php

/**
 * Class Desa
 */
class Desa extends Eloquent {

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

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

}

Kabupaten.php

<?php

// app/models/Kabupaten.php

/**
 * Class Kabupaten
 */
class Kabupaten extends Eloquent {

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

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

    /**
     * relasi dengan tabel desa
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasManyThrough
     */
    public function desa()
    {
        return $this->hasManyThrough('Desa', 'Penduduk', 'id_kabupaten', 'id_penduduk');
    }

}

Penduduk.php

<?php

// app/models/Penduduk.php

/**
 * Class Penduduk
 */
class Penduduk extends Eloquent {

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

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

}

tabel_desa.php

<?php

// app/database/migrations/tabel_desa.php

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

/**
 * Class TabelDesa
 */
class TabelDesa extends Migration {

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('desa', function (Blueprint $table)
        {
            $table->increments('id');
            $table->integer('id_penduduk')
                  ->unsigned();
            $table->string('nama');
            $table->foreign('id_penduduk')
                  ->references('id')
                  ->on('penduduk')
                  ->onDelete('cascade');
        });
    }

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

}

tabel_kabupaten.php

<?php

// app/database/migrations/tabel_kabupaten.php

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

/**
 * Class TabelKabupaten
 */
class TabelKabupaten extends Migration {

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

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

}

tabel_penduduk.php

<?php

// app/database/migrations/tabel_penduduk.php

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

/**
 * Class TabelPenduduk
 */
class TabelPenduduk extends Migration {

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('penduduk', function (Blueprint $table)
        {
            $table->increments('id');
            $table->integer('id_kabupaten')
                  ->unsigned();
            $table->string('nama');
            $table->foreign('id_kabupaten')
                  ->references('id')
                  ->on('kabupaten')
                  ->onDelete('cascade');
        });
    }

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

}

TabelDesaSeeder.php

<?php

// app/database/seeds/TabelDesaSeeder.php

/**
 * Class TabelDesaSeeder
 */
class TabelDesaSeeder extends Seeder {

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

        Desa::create([
            'id_penduduk' => 1,
            'nama'         => 'Cigugur Kidul'
        ]);

        Desa::create([
            'id_penduduk' => 2,
            'nama'         => 'Cigugur Kaler'
        ]);
    }

}

TabelKabupatenSeeder.php

<?php

// app/database/seeds/TabelKabupatenSeeder.php

/**
 * Class TabelKabupatenSeeder
 */
class TabelKabupatenSeeder extends Seeder {

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

        Kabupaten::create([
            'nama' => 'Subang'
        ]);
    }

}

TabelPendudukSeeder.php

<?php

// app/database/seeds/TabelPendudukSeeder.php

/**
 * Class TabelPendudukSeeder
 */
class TabelPendudukSeeder extends Seeder {

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

        Penduduk::create([
            'id_kabupaten' => 1,
            'nama'         => 'Heru Rusdianto'
        ]);

        Penduduk::create([
            'id_kabupaten' => 1,
            'nama'         => 'Ibnu Rusdianto'
        ]);
    }

}