<?php

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

class DbRevisions extends Migration
{

    public function up()
    {
        Schema::create('revisions', function(Blueprint $table)
        {
            $table->engine = 'InnoDB';
            $table->increments('id');
            $table->integer('user_id')->unsigned()->nullable()->index();
            $table->string('field')->nullable()->index();
            $table->string('cast')->nullable();
            $table->text('old_value')->nullable();
            $table->text('new_value')->nullable();
            $table->string('revisionable_type');
            $table->integer('revisionable_id');
            $table->timestamps();
            $table->index(['revisionable_id', 'revisionable_type']);
        });
    }

    public function down()
    {
        Schema::dropIfExists('revisions');
    }

}
