ContainerView.pushObject() does not automatically connect dynamically added views with a Container object.
The absence of an auto-wired container leads to a rendering error when a view renders a template containing a handlebars render helper.
SIMPLE SCENARIO THAT FUNCTIONS (TO SOME EXTENT)
View:
App.DynamicView = Em.View.extend({
templateName: 'dynamic',
didInsertElement: function() {
var control = this.get('controller');
control.send( 'view_inserted', this.templateName, control._debugContainerKey);
control.send('callDynamicController');
}
});
Template:
<script type="text/x-handlebars" data-template-name="dynamic">
dynamic
</script>
Controller (only used when manually assigned):
App.DynamicController = Em.ObjectController.extend({
className: 'App.DynamicWithRenderController',
callDynamicController: function() {
console.log('DynamicController.callDynamicController()');
}
});
Index Controller:
App.IndexController = Em.ObjectController.extend({
view_inserted: function(aview, acontroller) {
console.log('view inserted!', aview, acontroller);
}
})
Instantiation code:
var acontainer = App.DynamicController.create({});
var aview = App.DynamicView.create({ controller: acontroller })
acontainerView.pushObject(aview);
These classes render & behave as expected, but if you interogate them, lack some of the Ember-wiring (e.g. no _debugContainerKey & container properties IIRC):
ADVANCED SCENARIO THAT FAILS
If we introduce a handlebars template that uses rendering helpers, it breaks rendering. The dynamically added view currently lacks some properties the rendering helper assumes
<script type="text/x-handlebars" data-template-name="dynamic-with-render">
dynamic w/render:
{{render knob}}
</script>
and make knob look like this:
<script type="text/x-handlebars" data-template-name="knob">
{{render knob}}
</script>
The (failing) dynamic view instantiation code:
var acontainer = App.DynamicController.create({});
var aview = App.DynamicView.create({
controller: acontroller,
template:'dynamic-with-render' })
acontainerView.pushObject(aview);
CODE EXAMPLE
A more comprehensive example with some notes can be seen here:
http://jsfiddle.net/AshCoolman/KyJ2U/6/embedded/result/
NOTE: My tests include a custom handlebars helper based on the control helper called controlWithVars
THE ISSUE
It seems like I need to develop something that handles the Ember-wiring, either through:
- the more native ContainerView (digging into the Ember internals), OR
- a more detached new render helper possibly in an inelegant manner)
I'm uncertain about the next steps. It would be helpful if someone has already found an elegant solution, or could provide some useful tips.
USEFUL RESOURCES
https://github.com/emberjs/ember.js/issues/2108
What is the purpose of the Ember.Container