How does Simulating Joins works in Couchbase?

Question

I have documents one is dependent to other. first:

{
  \"doctype\": \"closed_auctions\",
  \"seller\": {
    \"person\": \"person11304\"
  },
  \"buyer\":          


        

Answer 1

An other solution consist to merge datas in a custom reduce function.

// view
function (doc, meta) {
  if (doc.doctype === "people") {
     emit(doc.id, doc);
  }
  if (doc.doctype === "closed_auctions") {
     emit(doc.buyer.person, doc);
  }
}

// custom reduce
function (keys, values, rereduce) {
   var peoples = values.filter(function (doc) {
       return doc.doctype === "people";
   });
   for (var key in peoples) {
      var people = peoples[key];
      people.closed_auctions = (function (peopleId) {
          return values.filter(function (doc) {
             return doc.doctype === "closed_auctions" && doc.buyer.person === peopleId;
          });
      })(people.id);
   }
   return peoples;
}

And then you can query one user with "key" or multiple users with "keys".

After I don't know what the performances issues are with this method.