javascript - BackBone Model - > Collection -> Model -> Update - does not trigger change on root model -

i'm having this

serverinfomodel = backbone.relationalmodel.extend({          relations: [         {             type: backbone.hasmany,             key: 'data',             relatedmodel: 'data',             collectiontype: 'datacollection',             reverserelation: {                 key: 'id',                 includeinjson: 'id'             }         }     ] }) data = backbone.relationalmodel.extend({ });  datacollection = backbone.collection.extend({     model: data }); 

now have view associated serverinfomodel. if change value model data within collection, "change" not triggered on serverinfomodel, triggered on datacollection;

how can pass "change" event serverinfomodel datacollection ?

i found out how it, listen 'data' change , trigger 'change' futher

serverinfomodel = backbone.baserelationalmodel.extend({ url: function () {     return "/examples/serverinfo.json" }, setup: function () {     var self= this;     this.get('data').on('change', function () {         self.trigger("change");     }); },  relations: [     {         type: backbone.hasmany,         key: 'data',         relatedmodel: 'data',         collectiontype: 'datacollection',         reverserelation: {             key: 'id',             includeinjson: 'id'         }     } ] });  data = backbone.baserelationalmodel.extend({  });  datacollection = backbone.collection.extend({   model: data });