migration.php

<?php

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

class ExhibitionEventPivot extends Migration {

	/**
	 * Run the migrations.
	 *
	 * @return void
	 */
	public function up()
	{
		Schema::create('exhibition_calendar_event', function($t){
  			$t->increments('id');
  			$t->integer('exhibition_id')->unsigned();
  			$t->integer('calendar_event_id')->unsigned();
  			$t->integer('position')->unsigned();
  			$t->timestamps();

  			$t->foreign('exhibition_id')->references('id')->on('exhibitions')->onUpdate('cascade')->onDelete('cascade');
  			$t->foreign('calendar_event_id')->references('id')->on('calendar_events')->onUpdate('cascade')->onDelete('cascade');
  			$t->index(array('position', 'calendar_event_id'));

  		});
	}

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

}