I need to get the count of document that were associated to a group between two given dates. Thanks!
On Sun, Oct 5, 2014 at 8:13 AM, Stanley Iriele <siriele...@gmail.com> wrote: > Hey what date are you looking to filter to? Day/ month..year? > On Oct 4, 2014 10:11 PM, "Boaz Citrin" <bcit...@gmail.com> wrote: > > > Thanks Giovanni, > > You say I can get all the groups at the same time, > > but how can I achieve this and also filter by date? > > > > On Sun, Oct 5, 2014 at 4:04 AM, Giovanni P <fiat...@gmail.com> wrote: > > > > > You can use the second with group_level=1 and get all the groups at the > > > same time. > > > And you can use _count instead of _sum, so you don't even need to emit > > any > > > value, just the key. > > > > > > On Sat, Oct 4, 2014 at 8:24 PM, Boaz Citrin <bcit...@gmail.com> wrote: > > > > > > > Hello, > > > > > > > > My documents contain two fields to maintain group associations, say > > > "group" > > > > holds the group document id, and "associated" holds the date this > > > document > > > > was added to the group. > > > > Now I want to be able to know how many documents were added to a > given > > > > group[s] between two given dates. > > > > The challenge is that to be able to filter by dates, I need to have > the > > > > date as the key first part. > > > > But I also need the group as the first key part in order to aggregate > > the > > > > number of group associations. > > > > > > > > So I see two options here: > > > > > > > > 1. > > > > Map: associated, {"group": group} > > > > Reduce: a function that aggregates all values by group, which I > assume > > is > > > > fine as I know the number of groups is relatively small. > > > > (plus configuring reduce_limit=false ...) > > > > > > > > 2. > > > > Map: [group,associated], 1 > > > > Reduce: sum(values) > > > > Here I cannot retrieve multiple groups at once, so I use a request > per > > > > desired group. > > > > > > > > Tried the two approaches, with the first one gives faster response. > > Which > > > > leads me to two questions: > > > > 1. Is there any risk in a reduce function that produces a potentially > > > long > > > > string? > > > > 2. Is there a better way to achieve what I do here? > > > > > > > > Thanks! > > > > > > > > Boaz > > > > > > > > > >