Below is an example document.

    {
        "_id" : ...,
        "inprogress" : true,
        "name" : "Biz report",
 "inviteCode" : [
         {
                 "key" : "4fbd2b4b265a3",
                 "status" : "1"
         },
         {
                 "key" : "4fbd2b4b265b5",
                 "status" : "1"
         },
         {
                 "key" : "4fbd2b4b265b9",
                 "status" : "1"
         },
         {
                 "key" : "4fbd2b4b265bc",
                 "status" : "1"
         },
         {
                 "key" : "4fbd2b4b265c0",
                 "status" : "1"
         }
 ]
    }

According to the doc, I can use a modifier object as update argument, but it seems that an update argument doesn't include an filter on witch field I want to update. I can only use $set:{name:"xxx"} but I can't specify which element to update in a nested array. How do i set the "status" filed of the inviteCode column where key is "4fbd2b4b265a3"?

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