no, yours is just a simple filter, and it will always have them all as they all start from being off.
and it is somewhat simplified example. The original thing has multiple states, and i want the last/current one - whatever it is. say, i want to reduce things like assigning ( a=1, a=2, b=1, b=2, a=3 ) into flat last-state ( a=3, b=2 ) how to do that? svil On Sat, 22 Sep 2012 11:43:14 -0700 Mark Hahn <[email protected]> wrote: > > i want a view for all lamps that the currently off. > > You view is wrong. You should only emit when the lamp is off. > > Also, you should always return a value in reduce. Returning null will > screw things up. > > I would start by fixing these problems and then go from there. > > > On Sat, Sep 22, 2012 at 3:05 AM, svilen <[email protected]> wrote: > > > say i have some lamp status monitoring records, i.e. > > > > { "seq": 1, "name": "a", }, > > { "seq": 2, "name": "b", }, > > { "seq": 2, "name": "a", "on": true}, > > { "seq": 3, "name": "a", }, > > { "seq": 7, "name": "a", "on": true}, > > > > ... > > > > where default state is off, and when on, there's extra bool > > attribute for it. Records are sequenced (in time) by some .seq > > param. And there's many other here-irrelevant attributes. > > > > say i want a view for all lamps that the currently off. > > > > so, something like: > > > > map_func: function( doc) { > > if (doc.type == 'lamp') emit( [doc.name, doc.seq], doc ); > > } > > > > reduce_func: function( keys, values, rereduce) { > > var v = values[ values.length-1]; > > if (v == null || v.on) return null; > > return v; > > } > > > > always used with group_level= 1 > > > > but i get the very first state instead of very last state... > > > > and in the debug-log, i see that the keys passed to reduce are > > reversed! > > > > so i have to use descending=True, and only then it works correctly. > > > > the question is, is this expected, or is the default order defined > > somewhere else, or what? > > > > ciao > > svil > >
