snipe-it/database/migrations/2015_09_22_003413_migrate_mac_address.php

<?php

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

class MigrateMacAddress extends Migration {

	/**
	 * Run the migrations.
	 *
	 * @return void
	 */
	public function up()
	{
		DB::getDoctrineSchemaManager()->getDatabasePlatform()->registerDoctrineTypeMapping('enum', 'string');

		$f2=new \App\Models\CustomFieldset(['name' => "Asset with MAC Address"]);
		$f2->timestamps=false; //when this model was first created, it had no timestamps. But later on it gets them.
		if(!$f2->save()) {
			throw new Exception("couldn't save customfieldset");
		}
		$macid=DB::table('custom_fields')->insertGetId([
			'name' => "MAC Address",
			'format' => \App\Models\CustomField::PREDEFINED_FORMATS['MAC'],
			'element'=>'text']);
		if(!$macid) {
			throw new Exception("Can't save MAC Custom field: $macid");
		}

		$f2->fields()->attach($macid,['required' => false, 'order' => 1]);
		\App\Models\AssetModel::where(["show_mac_address" => true])->update(["fieldset_id"=>$f2->id]);

    Schema::table('assets', function (Blueprint $table) {
      $table->renameColumn('mac_address', '_snipeit_mac_address');
		});

		// DB::statement("ALTER TABLE assets CHANGE mac_address _snipeit_mac_address varchar(255)");

		$ans=Schema::table("models",function (Blueprint $table) {
			$table->renameColumn('show_mac_address','deprecated_mac_address');
		});
	}

	/**
	 * Reverse the migrations.
	 *
	 * @return void
	 */
	public function down()
	{
		//
		$f=\App\Models\CustomFieldset::where(["name" => "Asset with MAC Address"])->first();
		$f->fields()->delete();
		$f->delete();
		Schema::table("models",function(Blueprint $table) {
			$table->renameColumn("deprecated_mac_address","show_mac_address");
		});
		DB::statement("ALTER TABLE assets CHANGE _snipeit_mac_address mac_address varchar(255)");
	}

}