javascript - How to remove nested collection when destroying model? -

i'm initializing nested collection te following:

var post = {   id: 123,   title: 'sterling archer',       comments: [     {text: 'comment text', tags: ['tag1', 'tag2', 'tag3']},     {text: 'comment test', tags: ['tag2', 'tag5']}   ]   };  var postmodel = backbone.model.extend({    parse: function (response) {        if (response.comments) {           response.comments = new backbone.collection(response.comments);        }        return response;    } });  var post = new postmodel(post, {parse: true}); 

how should remove nested 'comments' collection when removing model?

post.destroy(); 

you can override destroy method of postmodel instead of sync (which not called in case of new model without id attribute):

destroy: function(options) {     this.get('comments').each(function(mdl) {          mdl.destroy();     });     backbone.model.prototype.destroy.call(this, options) }