It throws error when using mongodb aggregate

[wangking717]

via mongodb version 4.0.3

when using mongodb aggregate ,it throws error.

$pipeline = [
            ['$group' => [
                '_id' => null,
                'count' => [
                    '$sum' => 1
                ],
            ]],
];

$stat_data = CustomerOrder::getCollection()->aggregate($pipeline);
var_dump($stat_data);

Error info:

The 'cursor' option is required, except for aggregate with the explain argument

[wangking717]

when using
$num = CustomerOrder::find()->count(); // sum() also...
it throws the error too.. using mongodb 4.0.3

Error info:

The 'cursor' option is required, except for aggregate with the explain argument

[rustamwin]

Which is version your yii2-mongodb ?

[wangking717]

"yiisoft/yii2-mongodb": "~2.1.0"

Which version your yii2-mongodb ?

[rustamwin]

I think you have to use $match pipeline stage

$pipeline = [
            ['$match' => [
                //
            ]
            ['$group' => [
                '_id' => null,
                'count' => [
                    '$sum' => 1
                ],
            ]],
];

[wangking717]

I think you have to use $match pipeline stage

$pipeline = [
            ['$match' => [
                //
            ]
            ['$group' => [
                '_id' => null,
                'count' => [
                    '$sum' => 1
                ],
            ]],
];

I didn't use $match pipeline stage.

when using this issue, it throws error too.
$num = CustomerOrder::find()->count(); // sum() also...
it throws the error too.. using mongodb 4.0.3