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PObackbone.js collection adds empty element when created?
 

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  1. PObackbone.js collection adds empty element when created?
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    <p>I am assuming this is either a bug in my code or an undocumented (as far as I could find) feature of backbone.js. When I created my collection and my view there is already a model in that collection that I did not create, or I assume I did not create due to the undefined id. Below is my code.</p> <pre><code>// ---------------------------------------------------------- Work Order window.WO = Backbone.Model.extend({ default: { wonum: null, part: null, desc: null, comment: null, order: null, section: null }, url: "/rest/wo/" }); window.WOView = Backbone.View.extend({ tagName: "tr", className: "wo", events: { "keypress .woComment" : "updateOnEnter" }, initialize: function(options) { _.bindAll(this, 'render', 'close', 'updateOnEnter'); this.render = _.bind(this.render, this); this.model.bind('change', this.render); }, render: function() { $(this.el).html(this.woTemplate(this.model.toJSON())); this.input = this.$('.woComment'); this.input.bind('blur', this.close); return this; }, woTemplate: _.template($('#woTemplate').html()), close: function() { this.model.set({comment: this.input.val()}); this.model.save({},{contentType: 'application/jason'}); }, updateOnEnter: function(e) { if (e.keyCode == 13) this.close(); } }); // ------------------------------------------------------------- Section window.SectionC = Backbone.Collection.extend({ comparator: function(woObj) { return woObj.get('order'); } }); window.Section = Backbone.Model.extend({ defaults: { id: null, name: null }, events: { 'update' : 'doOrder', 'change' : 'doOrder' }, url: "/rest/section", woc: null, initialize: function() { this.woc = new SectionC({model: window.WO}); }, add: function(woObj) { this.woc.add(woObj); this.doOrder(); }, doOrder: function() { console.log("Calling doOrder"); var that = this; var sel = "#sec"+this.get('id')+" .wo"; $(sel).each(function(i,elem) { var elemID = $(elem).attr('id'); var woObj = that.woc.get(elemID); woObj.set({order: i}); }); }, }); window.SectionView = Backbone.View.extend({ tagName: "table", className: "section", initialize: function() { _(this).bindAll('add','remove','change'); this.render = _.bind(this.render, this); this.mySort = _.bind(this.mySort, this); }, sectionTemplate: _.template($('#sectionTemplate').html()), render: function() { this._rendered = true; var that = this; $(this.el).empty(); $(this.el).attr('id',"sec"+this.model.get('id')); var woData = null; _(this.models).each(function(woObj) { var wov = new WOView({ model: woObj, id: woObj.get('wonum')}); woData += wov.render().el; }); $(this.el).html(this.sectionTemplate({woData: woData})); return this; }, add: function(woObj) { woObj.set({section: this.model.id, id: woObj.get('wonum')}); this.model.add(woObj); if(this._rendered) { var wov = new WOView({ model: woObj, id: woObj.get('wonum')}); $(this.el).append(wov.render().el); } //this.mySort(); }, change: function() { this.render(); }, mySort: function() { var that = this; var sel = "#sec"+this.model.get('id')+" .wo"; $(sel).each(function(i,elem) { var elemID = $(elem).attr('id'); var woObj = that.model.woc.get(elemID); woObj.set({order: i}); }); }, saveSection: function() { var json = {}; json.section = this.model.get('id'); json.order = {}; var sel = "#sec"+this.model.get('id')+" .wo"; $(sel).each(function(i,elem) { json.order[i] = $(elem).attr('id'); }); console.log(json); _(this.model.woc.models).each(function(woObj) { if(woObj.get('id') != "" &amp;&amp; woObj.get('id') != undefined) woObj.save(); }); } }); // ---------------------------------------------------------------- Page window.PageC = Backbone.Collection.extend({ comparator: function(obj) { return obj.get('order'); } }); window.PageView = Backbone.View.extend({ tagName: "div", className: "prodSchedPage", initialize: function() { _(this).bindAll('add'); this.render = _.bind(this.render, this); }, render: function() { var that = this; this._rendered = true; $(this.el).empty(); // Loop through the sections and render them _(this.collection.models).each(function(secObj) { var v = new SectionView({model: secObj, id: secObj.get('id')}); $(that.el).append(v.render().el); }); return this; }, add: function(sectionObj) { this.collection.add(sectionObj); if(this._rendered) { this.render(); } }, addSection: function(sectionObj){this.add(sectionObj);}, addWO: function(secID,woObj) { var secObj = this.collection.get(secID); if(secID = undefined) { alert("Error: Section does not exist!"); return; } secObj.add(woObj); } }); window.PSPage = new window.PageC({}); window.PSPV = new window.PageView({collection: window.PSPage}); $("body").append(window.PSPV.render().el); //window.PSPV.add(new Section({id: 1, name: "Section 1"})); </code></pre>
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