firefly-iii/app/Models/TransactionCurrency.php

<?php
/**
 * TransactionCurrency.php
 * Copyright (c) 2017 thegrumpydictator@gmail.com
 *
 * This file is part of Firefly III.
 *
 * Firefly III is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Firefly III is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Firefly III.  If not, see <http://www.gnu.org/licenses/>.
 */

declare(strict_types=1);

namespace FireflyIII\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Watson\Validating\ValidatingTrait;

/**
 * Class TransactionCurrency
 *
 * @package FireflyIII\Models
 */
class TransactionCurrency extends Model
{
    use SoftDeletes;

    /**
     * The attributes that should be casted to native types.
     *
     * @var array
     */
    protected $casts
                        = [
            'created_at'     => 'date',
            'updated_at'     => 'date',
            'deleted_at'     => 'date',
            'decimal_places' => 'int',
        ];
    protected $dates    = ['created_at', 'updated_at', 'deleted_at', 'date'];
    protected $fillable = ['name', 'code', 'symbol', 'decimal_places'];

    /**
     * @param TransactionCurrency $currency
     *
     * @return TransactionCurrency
     */
    public static function routeBinder(TransactionCurrency $currency)
    {
        if (auth()->check()) {
            return $currency;
        }
        throw new NotFoundHttpException;
    }

    /**
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function transactionJournals()
    {
        return $this->hasMany('FireflyIII\Models\TransactionJournal');
    }
}