How to move an element in an array (mongodb)?

Question

MongoDB

Good afternoon! I have a document:

{ arr: [{ _id: 'a', val: 1 }, { _id: 'b', val: 4 }, { _id: 'd', val: 0 }, { _id: 'c', val: 8 }] }

And I need to move the array element "C" to position 2 (that is, before "D").
You can request a document on the server, get the element I need, pull it out of its position and stick it in the right one. But this is not a true way. Is there any way to do this in one request?

Answer 1

$pull and $push
$pull - obviously.
and $push is something like this:
$push: { "items" : { $each : [ "item" ], $position : 1 } }