source: Dev/trunk/src/server/bin/upgrade-db-2-to-3.js @ 527

var env = require('../env')
  , upgradeCouch = require('../config/upgrade-couchdb')
  , cryptoken = require('../util/crypto-token')
  , HTTPResult = require('../util/http-result')
  , _ = require('underscore')
  ;

function strip(obj) {
    var subcoded = false;
    var res = [];
    if ( _.isArray(obj) ) {
        res = _.map(obj,strip);
    } else if ( _.isObject(obj) ) {
        if ( obj.type === "Question" ) {
            _.each(obj.content, function(value,vindex) {
                switch(value.type) {
                case "StringInput":
                case "TextInput":
                case "NumberInput":
                    if ( !value.subcode ) {
                        value.subcode = '' + vindex;
                        subcoded = true;
                    }
                    break;
                case "ScaleInput":
                case "MultipleChoiceInput":
                    _.each(value.items, function(item,iindex) {
                        if ( !item.subcode ) {
                            item.subcode = '' + vindex + iindex;
                            subcoded = true;
                        }
                    });
                    break;
                }
            });
        }
        res = _.map(obj,function(val,key) {
            if ( val === null || val === "" ) {
                delete obj[key];
                return true;
            } else {
                return strip(val);
            }
        });
    }
    return subcoded || _.contains(res,true);
}

upgradeCouch(env.couchServerURL,env.dbName,function(doc){
    if ( strip(doc) ) {
        return doc;
    } else {
        return new HTTPResult(-1);
    }
}).then(function(res){
    console.log("done",res);
}, function(err){
    console.error("fail",err);
});