I have view map and reduce like this: Map:     function(doc) {            if(doc.type){             var usersLength = doc.users.length;             for (var i = 0; i < usersLength ; i++) {                     emit([doc.users[i].userid,doc.Service....

So I have Riak running on 2 EC2 servers, using python to run javascript Mapreduce. They have been clustered. Mainly used for "proof of concept".   There are 50 keys in the bucket, all the map/reduce function does is re-format the data. This i...

This is follow up from this question How to merge objects attributes from reduce to rereduce function in CouchDB  I've been following the accepted answer from the previous question. For quick review, this is my JSON schema:   {"emp_no": ....

Are there any reliable techniques for storing prototype-based libraries/frameworks in mongoDB's system.js?  I came across this issue when trying to use dateJS formats within a map-reduce.  JIRA #SERVER-770 explains that objects' closures - in...

There is a question (and answer) that deals with the general case. I am having difficulty using a scope variable as a field key (as opposed to the field value)  In the example below all the FULLY_CAPS fields are scope variables. In the case of SERVIC...

I take data from a search box and then insert into MongoDB as a document using the regular insert query. The data is stored in a collection for the word "cancer" in the following format with unique "_id".  {   "_id": {     ...

I'm working on a complicated map-reduce process for a mongodb database. I've split some of the more complex code off into modules, which I then make available to my map/reduce/finalize functions by including it in my scopeObj like so:    cons...

I want to reduce this object to just an object containing product name and average price. What's the fastest way to do it?  var foo = { group1: [         {             name: "one",             price: 100         },         {             n...

I'm trying to do a simple map reduce in the Mongo shell, but the reduce function never gets called. This is my code :  db.sellers.mapReduce(      function(){ emit( this._id, 'Map') } ,      function(k,vs){ return 'Reduce' },...

I'm stuck on the following:  A script is returning an arbitrary number n or array, like this:  [["a"], ["b"], ["c"], ["d"]]   I need to loop over the arrays using promise then(), but as I don't know how many el...