Tree: ObjectStoreModel doesn't observe async queries

[bill]

The observe() method hangs off of the promise returned by store.query(), not the promise's resolved value, so in this code:

when(
	this.childrenCache[id] = this.store.getChildren(parentItem),
	lang.hitch(this, function(children){
		//console.log("queried children of " + id + ": ", children);

		// Setup listener in case children list changes, or the item(s) in the children list are
		// updated in some way.
		if(children.observe){

children.observe() is always null. Thus the Tree won't get notifications about updates to the data store.

[bill]

In [29499]:

Fix data store update notifications for when store is asynchronous. Still needs a good test case. Fixes #15847 on trunk/ !strict. Also fixing the ObjectStoreModel doc.

[bill]

In [29500]:

Fix data store update notifications for when store is asynchronous. Still needs a good test case. Fixes #15847 on 1.8/ branch !strict. Also fixing the ObjectStoreModel doc.

[jzw]

hi, when I follow http://dojotoolkit.org/documentation/tutorials/1.8/store_driven_tree/ to add a new node, it cannot trigger Tree's _onItemChildrenChange。

The demo generate the item id at the client code, if I want to generate the item id at the server side, how should I write the code?