Develop Reference

How to check if a backbone view is rendered?

I am trying to append a view to an item in Backbone with a following code:
var viewContainer = this.$el.find('.view-container'),
pageWrap = this.$el.nextAll();
FIX
if (viewContainer.empty()) {
this.myView= new ProductsView();
viewContainer.append(application.myView.render().$el),
console.log(myView);
}
I am appending this view to the viewContainer with a toggle function, however, every time I click on the button, myView is appended again and again to the viewContainer instead of of only once. How do I check if the view is already rendered inside it before appending it? Is there a !this.rendered() equivalent I can use?
I found this thread but it is not helping me in this instance.
UPDATE - FROM console.log(viewContainer)
[div.view-container.product-container.active, div#subjects_menu.view-container.product-container.hidden.active, prevObject: p.fn.p.init[1], context: undefined, selector: ".view-container"]

From the looks of it, you want to make sure ProductsView is not created if it already exists.
Simplest way to do this would be:
if(!this.myView) {
this.myView= new ProductsView();
viewContainer.append(application.myView.render().$el),
}
It is better to work with application state than querying DOM. When you remove product view, simply do this.myView = null afterwards.
The only time you'd want to query DOM to know if a view is rendered is probably when you have to integrate an isolated external application over which you have no control that doesn't trigger any event/provide callbacks etc while rendering.

How to reference ember.js controllers that are in nested folders?

I'm building an EventController that has little modules of logic within sections or div's of the event screen.
Say for instance, event details may be in the main Event template but a small section might be the user's status with the event such as whether they RSVP'd etc. but since it's controlled by a different model than the event I'd think it should have it's own controller.
Would I put this in the EventController like such:
Controller = BaseController.extend
needs: ['event/user-status-area']
userStatusArea: Ember.computed.alias("controllers.event.user-status-area")
This obviously isn't working otherwise I wouldn't be here... but I'm looking for suggestions.
I'm very new to ember / ember-cli concepts so I'm sorry if I'm just blatantly way off base here.
In my brain, I would imagine keeping everything about an event centralized under the one EventController...
Am I missing something big? Is this possibly where the "Router" comes in?
UPDATE:
If so, I'd imagine it might look something like this in Router:
Route = BaseRoute.extend
model: (params) ->
#store.find('event',params.id)
renderTemplate: (controller,model) ->
userStatusController = controller.get('userStatusArea')
#render 'event'
#render 'event/user-status-area',
into: 'event',
outlet: 'user-status-area',
controller:userStatusController
model: model.event_user.find(#get('session.current_user.userId'))
No idea if this would even be considered a best practice for ember?
I guess this would be the question... what is the best way to create this type of structure?

One way is to create a nested route:
router.js
this.resource('event',{path:'event/:id'}, function(){
this.route('userStatus');
})
in the event template, you would add an {{outlet}}
When you transition to event/{id}/userStatus, the outlet would be automatically rendered with the templates/event/user-status.hbs template.
When you reference controllers/views etc. in ember-cli with a filename e.g. user-status, you need to reference it in camelCase:
needs: ['event/userStatus'],
not user-status.
Hope this helps.

Passing object available in the template into the {{render}} helper doesn't seem to work

I have an object defined globally as App.configObj which contains a property data. Inside a view's template I can use {{App.configObj.data}} to display the value and it works fine.
Inside that same template, I use {{render "viewC" model config=App.configObj}} to render a similar view, but the config property on that view remains null on didInsertElement. Other arguments set to primitive values are correctly set at that point.
Since App.configObj is definitely available in that context, shouldn't I be able to pass it into that view?
Here is the jsbin that illustrates the situation: http://emberjs.jsbin.com/misiyaki/12/edit
If you comment out the render call for ViewC, you can see that {{App.configObj.data}} renders just fine in the template.
My goal is to use an object encapsulating several properties to configure the view, so I need to be able to pass that object in. I spent a lot of time searching for similar content online but didn't find anyone trying this.
What am I missing?
Thanks!

I understand your struggle here with not being able to pass in a property in your render code... but in this case it doesn't seem that that is truly necessary.
Here is a fiddle with some changes to show you another way, that is essentially the same thing if i understood your intentions correctly. http://emberjs.jsbin.com/misiyaki/15/edit
The new code for your view:
App.ViewCView = Em.View.extend({
name: 'testName',
config: function () {
return App.configObj;
}.property(),
data: function () {
return this.get('config.data')
}.property('config'),
templateName: 'view-c'
});
Hope this helps!

Backbone: Lost reference to actual view?

I'm new to Backbone (and Marionette), and trying to write a pretty simple app using both. The app has a menu of "groups" on the left nav, and a list of "entries" on the main right div. Every time a Group menu item is clicked, I filter the entries with the group ID and show them, when hide all others.
Here is the Entry Item view (all scripts are in CoffeeScript btw):
class EntryItemView extends Backbone.Marionette.ItemView
tagName: 'tr'
template: _.template $('#entryItemTemplate').html()
render: ->
#$el.html #template(#model.toJSON())
show: ->
#$el.show()
hide: ->
#$el.hide()
Here is the Entry List view, extending Marionette's CollectionView:
class EntryListView extends Backbone.Marionette.CollectionView
itemView: EntryItemView
el: '#main tbody'
This is the AppRouter, pretty much straightforwad:
class AppRouter extends Backbone.Router
routes:
'group/:id' : 'showGroup'
router = new AppRouter()
router.on 'route:showGroup', (id) ->
_.each entryViews, (view) ->
if view.model.get('group_id') is parseInt(id)
view.show()
else
view.hide()
(The entryViews variable is a simple global array to store all EntryItemView instances).
With this approach, navigating the app to /group/:id indeed invokes the show() and hide() method of each EntryItemView object. The problem is, looks like the reference between this object and the actual HTML doesn't exist, so the actual element <tr> doesn't show or hide.
Can you guys point out what I'm doing wrong here? Thanks in advance.

Here are a couple pointers:
since your template is in the HTML, you just specify the jQuery selector with template: "#entryItemTemplate"
you can remove the render declaration, because Marionette does that on its own (i.e. you're implementing the default behavior)
unless you know what you're doing, you typically don't declare an el property in a collection view. Instead you declare a region (possibly within a layout), where you will call the show method to display a view instance
The reason your code probably doesn't work is that it looks like Backbone code with some Marionette stuff thrown in. Take a look at the free sample to my book on Marionette. It should get you started quickly with Marionette and will explain most of what you're trying to accomplish here.

Get element by ID returning null for Sencha Controller

Here is the controller I want to get
Ext.define('GS.controller.PickStorageController', {
extend: 'Ext.app.Controller',
id: 'pickStorageControl',
In the launch function I made it print its id
launch: function()
{
console.log(this.id);
},
Here is the output: pickStorageControl
In my code, (after all of the launch functions for controllers are done) I have this: document.getElementById('pickStorageControl'); Which is apparently null.
How do I fix this??
Before you say that I should be using refs and controls, I need it to work this particular way for my plans to be executed later...

for get object of controller use this code
GS.app.getcontroller('PickStorageController');
It will give you controllers object

The controller will not have an id, only DOM elements will. I am not sure what you are trying to accomplish, but you only use getElementById for DOM elements.