firefly-iii/app/Models/TransactionGroup.php

<?php
/**
 * TransactionGroup.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 FireflyIII\User;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\SoftDeletes;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;


/**
 * Class TransactionGroup.
 */
class TransactionGroup extends Model
{
    use SoftDeletes;

    /**
     * The attributes that should be casted to native types.
     *
     * @var array
     */
    protected $casts
        = [
            'created_at' => 'datetime',
            'updated_at' => 'datetime',
            'deleted_at' => 'datetime',
            'title'      => 'string',
        ];

    /** @var array Fields that can be filled */
    protected $fillable
        = ['user_id', 'title'];

    /**
     * Route binder. Converts the key in the URL to the specified object (or throw 404).
     *
     * @param string $value
     *
     * @return TransactionGroup
     * @throws NotFoundHttpException
     */
    public static function routeBinder(string $value): TransactionGroup
    {
        if (auth()->check()) {
            $groupId = (int)$value;
            /** @var User $user */
            $user = auth()->user();
            /** @var TransactionGroup $group */
            $group = $user->transactionGroups()->where('transaction_groups.id', $groupId)
                          ->first(['transaction_groups.*']);
            if (null !== $group) {
                return $group;
            }
        }

        throw new NotFoundHttpException;
    }

    /**
     * @codeCoverageIgnore
     * @return BelongsToMany
     */
    public function transactionJournals(): BelongsToMany
    {
        return $this->belongsToMany(TransactionJournal::class);
    }

    /**
     * @codeCoverageIgnore
     * @return BelongsTo
     */
    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

}