aggregate data and still use changefeed in rethinkDB - rethinkdb

Question

I'm enjoying learning reQL so far but I stumbled upon a problem.
This is the data that I have stored in a table called events
[{
"date": "Tue Mar 17 2015 00:00:00 GMT+00:00" ,
"id": "00dacebd-b27e-49b5-be4b-42c2578db4bb" ,
"event_name": "View page" ,
"total": 4 ,
"unique": 4
},
{
"date": "Mon Mar 16 2015 00:00:00 GMT+00:00" ,
"id": "09ac3579-960b-4a2b-95be-8e018d683494" ,
"event_name": "View page" ,
"total": 68 ,
"unique": 35
},
{
"date": "Tue Mar 17 2015 00:00:00 GMT+00:00" ,
"id": "0bb01050-e93d-4845-94aa-b86b1198338d" ,
"event_name": "Click" ,
"total": 17 ,
"unique": 8
},
{
"date": "Mon Mar 16 2015 00:00:00 GMT+00:00" ,
"id": "174dcf3e-7c77-47b6-a05d-b875c9f7e563" ,
"event_name": "Click" ,
"total": 113 ,
"unique": 35
}]
And I would like the end result to look like this
[{
"date": "Mon Mar 16 2015 00:00:00 GMT+00:00",
"Click": 113,
"View Page": 68
},
{
"date": "Tue Mar 17 2015 00:00:00 GMT+00:00",
"Click": 17,
"View Page": 4
}]
The closet I got was with this query:
r.table("events").orderBy({index: r.desc('date')}).group('date').map(function(event) {
return r.object(event('repo_name'), event('unique'));
}).reduce(function(a, b) {
return a.merge(b.keys().map(function(key) {
return [key, a(key).default(0).add(b(key))];}).coerceTo('object'));
})
The results is:
[{
"date": "Mon Mar 16 2015 00:00:00 GMT+00:00",
"reduction": {
"Click": 113,
"View page": 68
}
},
{
"group": "Tue Mar 17 2015 00:00:00 GMT+00:00",
"reduction": {
"Click": 17,
"View page": 4
}
}]
However as you can see the events are nested under reduction and changefeeds won't work on this query either :(
Anyone can point me in the right direction?
Cheers,

Answer 1

You can change the group/reduction format like this:
query.ungroup().map(function(row){
return r.expr({date: row('group')}).merge(row('reduction'));
})
Unfortunately changefeeds on aggregations aren't supported as of 1.6, but that should be possible in 2.2 or 2.3 (so in a few months).