<?php

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

class BlockOccurrence extends Migration {

	/**
	 * Run the migrations.
	 *
	 * @return void
	 */
	public function up()
	{
        Schema::create('block_occurrence', function (Blueprint $table) {
            $table->unsignedInteger('block_id');
            $table->unsignedInteger('occurrence_id');
            $table->integer('position')->nullable();
            $table->primary(['block_id', 'occurrence_id']);

            $table->foreign('block_id')->references('id')
                ->on('blocks')->onDelete('CASCADE')->onUpdate('CASCADE');
            $table->foreign('occurrence_id')->references('id')
                ->on('occurrences')->onDelete('CASCADE')->onUpdate('CASCADE');
        });
	}

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

}