Available now in the appstore: Bootstrap TreeView widget (Mendix 5.1.1 and up) Bootstrap TreeView widget demo project (Mendix 5.8.1) I had loads of trouble getting the existing tree widget to do what I need so I decided to create a new one. This widget does not access the database by itself but calls a microflow to get the data. Objects are related to each other by linking each object to its parent. Objects without a parent end up at the top of the tree. Available as actions from a microflow: Refresh the entire tree Update a part of the tree and add new nodes. Set the selected node. The widget is available on git: https://github.com/synobsys/mendix-BootstrapTreeView The demo project is in the same repository too. Have fun!