javascript - return first element from array as computed property from Ember controller subclass -


i trying return first element of array computed property template controller. code below. 100% array , template. problem syntax in controller. array works made of work objects. , ideally return first element work. possible in javascript?

best.

//controller works.js

import ember "ember";   export default ember.controller.extend({   firstelement: function () {     var arr = this.get('model');     return arr[0];     console.log(arr[0]);   }.property('work') });

//template works.js

<div class="right">   {{#liquid-with model |currentmodel|}}     {{firstelement}}   {{/liquid-with}} </div>

//route works.js

import ember 'ember';  var work = ember.object.extend({   name: '',   year: '',   description:'',   image:'',   logo:'',    work_id: function() {     return this.get('name').dasherize();   }.property('name'),   });  var minibook = work.create({   id: 1,   name: 'minibook',   year: '2014',   description:'minibook iphone app explores storytelling in own format. format',   image:'assets/images/minibook_iphone.png',   logo:'assets/images/minibook_logo.png' });  var poetics = work.create({   id: 2,   name: 'poetics',   year: '2013',   description:'lorem ipsum poetics',   image:'assets/images/poetics_iphone.png',   logo:'assets/images/poetics_logo.png' });   var workscollection = ember.arrayproxy.extend(ember.sortablemixin, {   sortproperties: ['id'],   sortascending: true,   content: []  });   var works = workscollection.create();  works.pushobjects([poetics, minibook]);   export default ember.route.extend({   model: function() {     return works;   }   });

this work.

long way (just improve computed property code):

// controller work.js import ember "ember"; export default ember.controller.extend({   firstelement: function () {     return this.get('model').get('firstobject'); // or this.get('model.firstobject');    }.property('model.[]') });

1) set works model in route, model in controller

2) .property(model.[]) means computed property on array, adding , deleting array element fire update. choose specific property i.e. .property(model.@each.modelproperty)

3) fistobject proper method (not [0]), since working ember.arrayproxy, see http://emberjs.com/api/classes/ember.arrayproxy.html

4) use {{firstelement}} in template

lazy way:

1) set model in route array or promise resolved in array

// works = ... export default ember.route.extend({   model: function() {     return works;   } });

2) model.firstobject in directly in template 

//template works {{model.firstobject}} {{!-- first object of model array --}} {{model.firstobject.name}}  {{!-- name of first object --}}

update: use proper iteration syntax http://ef4.github.io/liquid-fire/#/helpers/liquid-with/10

{{#liquid-with model currentmodel}}   {{currentmodel.firstobject.name}} {{/liquid-with}}

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