如何从数组MongoDB php中提取元素？

Question

I have the following document:

"parameters" : [
    {
        "592193d6470e6cf80d3c9874" : {
            "Speed" : "1",
            "Acceleration" : "2"
        }
    }]

I need to pull element by key 592193d6470e6cf80d3c9874.

I tried:

 $this->collection->update(
            [],
            ['$unset' => ['parameters' => $id]], ['multiple' => true]);

Where $id id 592193d6470e6cf80d3c9874.

Answer 1

$this->collection->update(['$unset' => ['parameters'=> ['_id'] => $id], ['multiple' => true]);

or

$this->collection->update(['$unset' => ['parameters.'.$parameterId => null]], ['multiple' => true]);