firefly-iii/app/Models/PeriodStatistic.php

<?php

namespace FireflyIII\Models;

use FireflyIII\Casts\SeparateTimezoneCaster;
use FireflyIII\Support\Models\ReturnsIntegerUserIdTrait;
use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\MorphTo;
use Illuminate\Database\Eloquent\SoftDeletes;

class PeriodStatistic extends Model
{
    use SoftDeletes;
    use ReturnsIntegerUserIdTrait;

    protected function casts(): array
    {
        return [
            'created_at'    => 'datetime',
            'updated_at'    => 'datetime',
            'deleted_at'    => 'datetime',
            'date'          => SeparateTimezoneCaster::class,
        ];
    }

    protected function count(): Attribute
    {
        return Attribute::make(
            get: static fn ($value) => (int)$value,
        );
    }


    public function primaryStatable(): MorphTo
    {

        return $this->morphTo();

    }

    public function secondaryStatable(): MorphTo
    {

        return $this->morphTo();

    }
    public function tertiaryStatable(): MorphTo
    {

        return $this->morphTo();

    }

    //
}