using Group along with asof in query.v1

[Kameshwaran A]

Hi ,

I am trying to group by changedate  on the histroy of all the stories in a time box however when I use group along with the below mentioned json, I am getting a server error :

If we cannot group by change date, what are all the fields I can use in group by ?

Working json without group :

---------------------------------------

{

    "from" : "Story",

        "select" : [

     "Name","Estimate","ChangeDate","Status.Name"

   ],

    "filter" : [

     "Timebox='Timebox:1318689'"

     

     ],

     "sort" : [

                +ChangeDateUTC

     ],

     "asof" :All

    

}

Json not wkorking (with Group)

----------------------------------------------

{

    "from" : "Story",

        "select" : [

     "Name","Estimate","ChangeDate","Status.Name"

   ],

    "filter" : [

     "Timebox='Timebox:1318689'"

     

     ],

     "sort" : [

                +ChangeDateUTC

     ],

     "asof" :All,

      "group":

    [{

      "from": "Story",

      "select":

        [

          "ChangeDate"

        ]

        }]

}