tree-structure

I'm using a NestedList with a underlying TreeStore. Now I want to add items to the NestedList as leafs. How can I do this? Currently my code (Controller, onAddButtonTapped) looks like this: var store = Ext.getStore('menuStore'); var customerAreaNode = store.getRoot().getChildAt(1); customerAreaNode.appendChild({name: "text", leaf:true}); customerAreaNode.expand(); store.sync(); This code results in two new empty listentries on leaf level (behind the correct node) and one new listentry on node level. Every new entry has no names shown in the NestedList but every item contains "text" in their

I have a list of documents in MongoDB with tree structure, where Model Tree Structures with Parent References pattern used. I want a single aggregation query which returns ancestor list(till the root), given the 'name' property. Structure: { '_id': '1', 'name': 'A', 'parent': '', }, { '_id': '2', 'name': 'B', 'parent': 'A', }, { '_id': '3', 'name': 'C', 'parent': 'B', }, { '_id': '4', 'name': 'D', 'parent': 'C', } Aggregation result:(Given, name = 'D') { '_id': '4', 'name': 'D', 'ancestors': [{name:'C'}, {name:'B'}, {name:'A'}] } Note: I can't change the document structure now. It will cause

How do i store a directory / hierarchy / tree structure in the database? Namely MSSQL Server. @olavk: Doesn't look like you've seen my own answer. The way i use is way better than recursive queries :) p.p.s. This is the way to go! There are many ways to store hierarchies in SQL databases. Which one to choose depends on which DBMS product you use, and how the data will be used. As you have used the MSSQL2005 tag, I think you should start considering the "Adjacency List" model; if you find that it doesn't perform well for your application, then have a look at Vadim Tropashko's comparison which