[cla][patch] Support hierarchical data

[Jonathan Bond-Caron]

The data api currently does not support hierarchical data.

This imposes some limitations like for example the dijit.form.Select or dijit.form.ComboBox? can't support <optgroup></optgroup> markup.

See ticket #11167

This proposed patch for discussion would allow for 'hierarchical data stores' and give more flexibility to how widgets can render data.

There are lots of use cases for this, not just <optgroup></optgroup>

[bill]

I think this will be addressed with the new dojo.data (or whatever we call it) API matching ​the HTML5 object interface where an item is simple a (JSON-esque) Object, see the ​dojo contributors thread.

Although that won't be appropriate for deeply hierarchical data like for a Tree control.

[Jonathan Bond-Caron]

Thanks, one approach could be:

new dijit.form.ComboBox?({store: html5api, schema: metadata});

Where metadata.getParent(item) could be called for find parents for that item...

[Kris Zyp]

In the new API there is a getChildren() method defined. ​http://docs.dojocampus.org/dojo/store

Does that help with this?

[Kris Zyp]

I believe the new API has adequate support for hierarchy