node.js - Why is mongoosastic populate / elastic search not populating one of my references? I'm getting an empty object -

i have 2 models i'm attempting reference. style , brand.

brand populates needed object, style empty.

i've tried clearing cache / deleting indexes. , without include_in_parent , type: 'nested'.

i feel may have specified es_type, etc.. not sure.

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product schema:

var mongoose = require('mongoose');     var schema = mongoose.schema;     var style = require('./style');     var brand = require('./brand');     var mongoosastic = require('mongoosastic');       var productschema = new mongoose.schema({       name: { type: string, lowercase: true , required: true},       brand: {type: mongoose.schema.types.objectid, ref: 'brand',              es_type:'nested', es_include_in_parent:true},         style: {type: mongoose.schema.types.objectid, ref: 'style',             es_schema: style, es_type:'nested', es_include_in_parent: true},                 year: { type: number }     });      productschema.plugin(mongoosastic, {       hosts: [         'localhost:9200'       ],       populate: [         {path: 'style'},         {path: 'brand'}       ]     });      product = module.exports = mongoose.model('product', productschema);      product.createmapping(function (err,mapping) {         if(err){         console.log('error creating mapping (you can safely ignore this)');         console.log(err);       }else{         console.log('product mapping created!');         console.log(mapping);         }     });      var stream = product.synchronize();     var count = 0;      stream.on('data', function(){       count++     });      stream.on('close', function(){       console.log('indexed whisks ' + count + " documents");     });      stream.on('error', function(){     }); 

style schema:

var mongoose = require('mongoose');     var schema = mongoose.schema;     var mongoosastic = require('mongoosastic');  var styleschema = new mongoose.schema({   name: { type: string, lowercase: true , required: true}, });  style = module.exports = mongoose.model('style', styleschema);  style.createmapping(function(err, mapping){   if(err) console.log('error w/ mapping : ', err);   console.log('mapping created');   console.log(mapping); })  var stream = style.synchronize(); var count = 0;  stream.on('data', function(){   count++ });  stream.on('close', function(){   console.log('indexed styles ' + count + " documents"); });  stream.on('error', function(){ }); 

search query:

    exports.topsearch = function(req, res) {   console.log(req.body, "search product")   product.search({query_string: {query: req.body.search}}, {from: req.body.fromnum,         size: req.body.size,         hydrate: req.body.hydrate     },     function(err, results) {       if (err) console.log('err', err);       if (results){       var data = results.hits.hits.map(function(hit) {         return hit       });       console.log('product data', data)       res.send(data);     }     else {       res.send({errmsg:'results not defined'})     }     }); }; 

when query, result in hit:

_source:  { name: 'redemption white rye whiskey',    brand: [object],    style: {},} }, 

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regarding comment request:

product being added db:

exports.create = function(req, res) {   product.create(req.body, function(err, product) {     if (err) {       console.log('err', err)     };     res.send({       product: product     });   }); }; 

front / angular:

  $scope.add = function () {     var prodstyle = json.parse($scope.selectedstyle);     $scope.product = $scope.product._id;     $scope.product.style = prodstyle._id;     console.log($scope.product.style, 'prod style');     product.create($scope.product).then(function (res) {       res.data.product.style = { name: prodstyle.name };       $scope.products.push(res.data.product);       $scope.product = {};       $scope.selectedstyle = {};     });   }; 

i've got working, differs examples given on npm / github.

i had remove es_schema: style, (as had accidentally done brand, why worked). had add es_type: "nested" / es_include_in_parent, gathered elasticsearch , mongoosastic documentation.

i'm not sure intended, seems work:

style: {type: mongoose.schema.types.objectid, ref: 'style',     es_type:'nested', es_include_in_parent:true}, 

i : style: [object] needed, when console.log results.hits .

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below example given in npm , did not work me:

var comment = new schema({     title: string   , body: string   , author: string });   var user = new schema({     name: {type:string, es_indexed:true}   , email: string   , city: string   , comments: {type: schema.types.objectid, ref: 'comment',     es_schema: comment, es_indexed:true, es_select: 'title body'} })  user.plugin(mongoosastic, {   populate: [     {path: 'comments', select: 'title body'}   ] })