How to use context.cube and request in Cubism.js? -

i trying learn cubism(but not find tutorials) . have few basic questions:

1. how use context.cube locally in cubism. running cube's evaluator locally on port 1081. tried using "localhost" , no luck.

2. how use request.eq(key,'value') . key request_events collection or request_metrics?

any appreciated.

[edit]: turns out there problem cube installation. have fixed , connect evaluator using "localhost:1081". however, still can't correct values using metric expressions.

here data looks in mongodb('request_events' collection name):

some({ "_id" : { "$oid" : "51e4347f44aee763f87a1214"} , "t" : { "$date" : "2013-07-15t17:42:18.000z"} , "d" : { "received" : { "$date" : "2013-07-15t17:42:23.817z"} , "urlbase" : "egauge2962.egaug.es" , "all" : 14837.0 , "low voltage" : 2883.0 , "lights" : 4914.0}})

i trying values of 'all' field when received date greater 2013-07-15t17:42:23.817z.

so far, this- http://localhost:1081/1.0/event?expression=request.ge(received,"2013-07-15t17:42:23.817z") returns me [].

sorry blow own horn, i've written cubism tutorial here: http://xaranke.github.io/articles/cubism-intro/. not cover cube, instead uses json data source.

one way think first problem can resolved use 127.0.0.1:1081 instead of localhost:1081. both resolve same url internally.

i'm not cube expert, digging around official documentation think key request_metrics. request.eq filter providing exact match match data key parameter of "value". unless specify key attribute of data value, not want do.