SG View with Reduce

I have this working CBL view that I need to reproduce as a CB view for a web client. We would like this over the public SG port 
if possible.

CBLView *view = [self.document.database viewNamed: @"jobs/uniqueDayNumbersForJob"];
if (!view.mapBlock) {
    NSString *const kSceneDocType = [Scene docType];
    [view setMapBlock: MAPBLOCK({
        if ([doc[@"type"] isEqualToString:kSceneDocType]) {
            NSString *jobID = doc[@"job_id"];
            NSString *sceneID = doc[@"_id"];
            NSString *dayNumber = doc[@"dayNumber"];
            if (jobID == nil) {
               jobID = @"";
            }
            emit(@[jobID, dayNumber, sceneID], dayNumber); // emit order is fixed because emit element is referred by index from calling method.
        }
    }) reduceBlock:REDUCEBLOCK({
        return @(values.count);
    }) version: @"4"]; // bump version any time you change the MAPBLOCK body!
}

CBLQuery *query = [view createQuery];

query.groupLevel = 2;

query.descending = NO;

NSString *myJobId = self.document.documentID;

query.startKey = @[myJobId];

query.endKey = @[myJobId, @{}];

return query;


And I am trying to reproduce that same view in a CB view like this:

{
    "views":{
        "unique_days_for_scene":{
            "map":"function (doc, meta) { if (doc.type == \"scene\") { emit([doc.job_id, doc.dayNumber, meta.id], doc.dayNumber); } }",
            "reduce":"function (key, values, rereduce) { return values.count; }"
        }
    }
}

Called this way:

https://xxxxxx/shotbotdb/_design/unique_days_for_scene/_view/unique_days_for_scene?startkey=%5B%22-eMNk7zD8x_EQC66UVuP7QX%22%5D&endkey=%5B%22-eMNk7zD8x_EQC66UVuP7QX%7B%7D%22%5D&descending=false&group_level=2&reduce=true&stale=false