TreePanel to use different store at each level?

[lxu]

Is there a way to build a tree so that level1 nodes use Store1, level2 child nodes use Store2, and so on?

The reason I want to do that is because in my tree the data at each level are different and need to be fetched using different proxies/urls and tie to different models.

[mitchellsimoens]

You can use a TreeStore and when you expand a node that doesn't have any children defined it will then try to load the nodes for that node sending the id of the node that was expanded.

[lxu]

You can use a TreeStore and when you expand a node that doesn't have any children defined it will then try to load the nodes for that node sending the id of the node that was expanded.

I understand that it will call the backend using the url defined in proxy, such as /service/abc?node=id. However, what if I want the node expansion to call /service/xyz/id?

[lxu]

Also since my 2nd service url /services/xyz/id would return a different json (at least the root will be different for my reader), how do I specify the reader in my TreeStore? Is it possible to update the reader at run time?