Laravel Faker で 日付ダミーデータ間の整合性を取る

$fakerでdateTimeのダミーデータの整合性を取りたい

/database/factory/PlanFactory.php

use Faker\Generator as Faker;

$factory->define(\App\Plan::class, function (Faker $faker) {
    return [
        //
        [
            'start_datetime'=>$faker->dateTimeBetween('1day', '1year')->format('Y-m-d H:i'),
            'end_datetime'=> $faker->dateTimeBetween('1day', '1year')->format('Y-m-d H:i'),
        ]
    ];
});

ダミーデータでstart_at とend_atの値がランダムになってしまうためend_at はstart_at の1～2時間後に値を設定したい。

Faker dateTimeBetweenの戻り値はDatetime型

vendor\fzaninotto\faker\src\Faker\Provider\DateTime.php

    /**
     * Get a DateTime object based on a random date between two given dates.
     * Accepts date strings that can be recognized by strtotime().
     *
     * @param \DateTime|string $startDate Defaults to 30 years ago
     * @param \DateTime|string $endDate   Defaults to "now"
     * @param string|null $timezone time zone in which the date time should be set, default to DateTime::$defaultTimezone, if set, otherwise the result of `date_default_timezone_get`
     * @example DateTime('1999-02-02 11:42:52')
     * @return \DateTime
     * @see http://php.net/manual/en/timezones.php
     * @see http://php.net/manual/en/function.date-default-timezone-get.php
     */
    public static function dateTimeBetween($startDate = '-30 years', $endDate = 'now', $timezone = null)
    {
        $startTimestamp = $startDate instanceof \DateTime ? $startDate->getTimestamp() : strtotime($startDate);
        $endTimestamp = static::getMaxTimestamp($endDate);

        if ($startTimestamp > $endTimestamp) {
            throw new \InvalidArgumentException('Start date must be anterior to end date.');
        }

        $timestamp = mt_rand($startTimestamp, $endTimestamp);

        return static::setTimezone(
            new \DateTime('@' . $timestamp),
            $timezone
        );
    }

なので、日付を一度$fakerで作成し、メモリに持ち、意図する日付に修正するように変更しました。

use Faker\Generator as Faker;

$factory->define(\App\Plan::class, function (Faker $faker) {
    $scheduled_date = $faker->dateTimeBetween('+1day', '+1year');

    return [
        'start_datetime'=>$scheduled_date->format('Y-m-d H:i:s'),
        'end_datetime'=> $scheduled_date->modify('+1hour')->format('Y-m-d H:i:s'),
        'remind_at'=>$scheduled_date->modify('-1day')->format('Y-m-d H:i:s'),
    ];
});

これで faker で作る日付データの整合性が取れました。

以上です。