How to get total count of paged data using query.v1

Question

How do I get the total count of results when paging with the query.v1 endpoint?

rest-1.v1/Data

A request like this:

/rest-1.v1/Data/Member?page=2,0

returns the following:

<Assets total="4" pageSize="2" pageStart="0">...

Note the attribute total="4".

query.v1

Whereas a query like this:

{
  "from": "Story",
  "page":
  {
    "start":0,
    "size":2
  }
}

returns the following:

[
    [
        {
            "_oid": "Story:1007"
        },
        {
            "_oid": "Story:1015"
        }
    ]
]

Note the lack of any total count.

Is there possibly some special parameter I can provide in the select statement to include the count? (Similar to @Count with the rest-1.v1/Data endpoint?)

Answer 1

After further investigation, here is a solution to count results using two queries:

[
    {
        "from": "Scope",
        "select":["Workitems:Story[AssetState!='Dead'].@Count"],
        "filter":["ID='Scope:0'"]
    },
    {
        "from": "Story",
        "select": ["Name"],
        "filter":["Scope='Scope:0'","AssetState!='Dead'"],
        "page":
            {
                "start":0,
                "size":200
            }
    }
]

Some clarification on line 4:

"select":["Workitems:Story[AssetState!='Dead'].@Count"]

After "Workitems" we are down-casting the collection to "Story", and then filtering where the "AssetState" isn't "Dead" to get active stories and finally counting Workitems.

Here you will find some references and extra documentation:

VersionOne Grammars

Answer 2

Unfortunately this information is not by default present when using query.v1 endpoint, as it is with rest-1.v1. But here is a workaround you could use, with a two query approach.

[
    {
        "from": "Scope",
        "select":["Workitems.@Count"],
        "filter":["ID='Scope:0'","Workitems.AssetType='Story'"]
    },
    {
        "from": "Story",
        "select": ["Name"],
        "filter":["Scope='Scope:0'"],
        "page":
        {
            "start":0,
            "size":2
        }
    }
]

Answer 3

@LaureanoRemedi answered the question but I wanted to expand on it to accommodate filtering Workitems by more than just Scope.

Say, for example, we wanted to count the number of tasks belonging to a Story. We can use the down-cast-and-filter syntax to filter Tasks belonging to that Scope by their Parent attribute:

"Workitems:Task[Parent='Story:1007'].@Count"

With that, we can build a multi-query request:

[{
  "from": "Scope",
  "where": {"ID":"Scope:1000"},
  "select": [ "Workitems:Task[Parent='Story:1007'].@Count" ]
},
{
   "from": "Task",
   "where": { "Parent": "Story:1007" }
}]

That returns the count as well as the results:

[
    [
        {
            "_oid": "Scope:1000",
            "Workitems:Task[Parent='Story:1007'].@Count": "2"
        }
    ],
    [
        {
            "_oid": "Task:1008"
        },
        {
            "_oid": "Task:1009"
        }
    ]
]