无法使用mongodb访问laravel中的created_at和updated_at日期

Question

我无法使用MongoDB访问Laravel模型中的created_at和updated_at属性。我在数据库中的日期格式如下：

"created_at" : {
    "sec" : NumberInt(1475126325), 
    "usec" : NumberInt(840000)
}, 
"updated_at" : {
    "sec" : NumberInt(1475126325), 
    "usec" : NumberInt(840000)
}, 

我从MongoDB查询中得到以下结果：

App\Modules\Admin\Models\Segment Object
(
    [table:protected] => tbl_segment
    [timestamps] => 1
    [fillable:protected] => Array
        (
            [0] => name
            [1] => created_at
            [2] => updated_at
        )

    [collection:protected] => 
    [primaryKey:protected] => _id
    [parentRelation:protected] => 
    [connection:protected] => 
    [keyType:protected] => int
    [perPage:protected] => 15
    [incrementing] => 1
    [attributes:protected] => Array
        (
            [_id] => MongoDB\BSON\ObjectID Object
                (
                    [oid] => 57ecbefe15285745ba039871
                )

            [created_at] => Array
                (
                    [sec] => 1475133182
                    [usec] => 832000
                )

            [updated_at] => Array
                (
                    [sec] => 1475133182
                    [usec] => 832000
                )

        )

    [original:protected] => Array
        (
            [_id] => MongoDB\BSON\ObjectID Object
                (
                    [oid] => 57ecbefe15285745ba039871
                )

            [created_at] => Array
                (
                    [sec] => 1475133182
                    [usec] => 832000
                )

            [updated_at] => Array
                (
                    [sec] => 1475133182
                    [usec] => 832000
                )

        )

    [relations:protected] => Array
        (
        )

    [hidden:protected] => Array
        (
        )

    [visible:protected] => Array
        (
        )

    [appends:protected] => Array
        (
        )

    [guarded:protected] => Array
        (
            [0] => *
        )

    [dates:protected] => Array
        (
        )

    [dateFormat:protected] => 
    [casts:protected] => Array
        (
        )

    [touches:protected] => Array
        (
        )

    [observables:protected] => Array
        (
        )

    [with:protected] => Array
        (
        )

    [morphClass:protected] => 
    [exists] => 1
    [wasRecentlyCreated] => 
)

当我尝试访问created_at日期时，我收到以下错误：

  

Model.php第2983行中的ErrorException：   preg_match（）期望参数2为字符串，给定数组

Answer 1

在为mongodb更新laravel包（jessengers）后，我遇到了类似的问题。你可以尝试 - 查找以下行

if (preg_match('/^(\d{4})-(\d{1,2})-(\d{1,2})$/', $value)) {

在 vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php 中找到的Model.php中的

并将其替换为

if (preg_match('/^(\d{4})-(\d{1,2})-(\d{1,2})$/', $value['sec'])) {

vendor/nesbot/carbon/src/Carbon/Carbon.php

将 createFromFormat() 替换为 -

public static function createFromFormat($format, $time, $tz = null)
    {
        $time = date('Y-m-d H:i:s' , $time['sec']);

        if ($tz !== null) {
            $dt = parent::createFromFormat($format, $time, static::safeCreateDateTimeZone($tz));
        } else {
            $dt = parent::createFromFormat($format, $time);
        }

        if ($dt instanceof DateTime) {
            return static::instance($dt);
        }

        $errors = static::getLastErrors();
        throw new InvalidArgumentException(implode(PHP_EOL, $errors['errors']));
    }

注意： - 可能有更好的解决方案，所以如果有其他人找到了替代方案，请分享。