Question

If I have a controller:

HTH.todosController = SC.ArrayProxy.create({
  content: HTH.store.find(HTH.Todo)
});

I can display all todos doing this:

...
<script type="text/x-handlebars">
  {{#collection contentBinding="HTH.todosController"}}
    {{content}}
  {{/collection}}
</script>
...

But how would I display a todo with a specific ID coming from the view?

...
<script type="text/x-handlebars">
  {{#view contentBinding="HTH.todosController.specific" specificId="1"}}
    {{content}}
  {{/view}}
</script>
...

Answer 1

Here s a solution in jsfiddle allowing you to define the specific id of the todo in the handlebars definition of the view as you have in your example. It s a bit crude, but it works.

Handlebars:

<script type="text/x-handlebars">
{{view App.SpecificIdWrapper}}
<hr />
{{#collection App.TodosView contentBinding="App.todosController"}}
    {{content.name}}
{{/collection}}
<hr />
{{view App.SelectedToDoView}}
</script>

<script type="text/x-handlebars" data-template-name="specificId">
{{#view App.SpecificIdView dataBinding="App.todosController.content" specificId=3}}
    Specific Todo Id: {{content.id}}
    <br />
    Specific Todo Name: {{content.name}}
{{/view}}
</script>

<script type="text/x-handlebars" data-template-name="selectedToDo">
{{#view contentBinding="App.todosController.selectedToDo.content"}}
  Selected Todo Id: {{content.id}}
{{/view}}

JavaScript:

App = Ember.Application.create();

App.SpecificIdWrapper = Ember.View.extend({
    templateName:  specificId 
});

App.SpecificIdView = Ember.View.extend({
content: null,
data: null,
specificId: null,

_getTodoById: function() {
    var data = this.get( data ); 
    if(data) {
        for(var i=0;i<data.length;i++) {
            if(data[i].get( id ) === this.get( specificId )) {
                this.set( content , data[i]);
                break;
            }
        }
    }
},

// This will make sure the content is set when the view is rendered
didInsertElement: function() {
    this._getTodoById();
},
// And this will update the content whenever specificId is changed
specificIdDidChange: function() {
    this._getTodoById();
}.observes( specificId )
});

App.SelectedToDoView = Ember.View.extend({
    templateName:  selectedToDo 
});

App.TodosView = Ember.CollectionView.extend({
itemViewClass: Ember.View.extend({
    click: function() {
        App.todosController.set( selectedToDo , this);
    }
})
});

App.todosController = Ember.ArrayController.create({
content: [
    Ember.Object.create({id: 1, name: "obj1"}),
    Ember.Object.create({id: 2, name: "obj2"}),
    Ember.Object.create({id: 3, name: "obj3"}),
    Ember.Object.create({id: 4, name: "obj4"}),
    Ember.Object.create({id: 5, name: "obj5"}),
    Ember.Object.create({id: 6, name: "obj6"})
],
selectedToDo: null
});

Answer 2

Are you thinking about a CRUD style master/details workflow?

If you are, here s a series of tutorials I just wrote for CRUD operations in SC2.

Basically, I attach a double click handler to the table row that triggers a state chart action to display the details in a modal dialog.

CollectionView : SC.CollectionView.extend({
contentBinding:  App.resultsController ,

itemViewClass: SC.View.extend({
  tagName:  tr ,

  // Spit out the content s index in the array proxy as an attribute of the tr element
  attributeBindings: [ contentIndex ],

  willInsertElement: function() {
    this._super();

    // Add handler for double clicking
    var id = this.$().attr( id );
    this.$().dblclick(function() {
      App.statechart.sendAction( showUser , $( #  + this.id).attr( contentIndex ));
    });
  }
})

Part 4 of the tutorial shows how I did this.

Hope this helps.

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