firefly-iii/app/Models/TransactionJournalMeta.php

<?php
/**
 * TransactionJournalMeta.php
 * Copyright (C) 2016 thegrumpydictator@gmail.com
 *
 * This software may be modified and distributed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International License.
 *
 * See the LICENSE file for details.
 */

declare(strict_types=1);

namespace FireflyIII\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\SoftDeletes;

/**
 * Class TransactionJournalMeta
 *
 * @package FireflyIII\Models
 */
class TransactionJournalMeta 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',
        ];
    protected $dates    = ['created_at', 'updated_at', 'deleted_at'];
    protected $fillable = ['transaction_journal_id', 'name', 'data', 'hash'];
    protected $table    = 'journal_meta';

    /**
     * @param $value
     *
     * @return mixed
     */
    public function getDataAttribute($value)
    {
        return json_decode($value);
    }

    /**
     * @param $value
     */
    public function setDataAttribute($value)
    {
        $data                     = json_encode($value);
        $this->attributes['data'] = $data;
        $this->attributes['hash'] = hash('sha256', $data);
    }

    /**
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function transactionJournal(): BelongsTo
    {
        return $this->belongsTo('FireflyIII\Models\TransactionJournal');
    }
}