I believe this function can work using k-denied but still not very good with the JS for the tool suite. I have two treeviews. I'm working on a screen where once a treeview is persisted to the DB, a user could go back and update it with new nodes, a reordering of nodes or deleting the nodes.
How can I validate that if a node is dragged from the left tree to the right tree, that if the ID (identified by ext_model_id) exists, don't drop on the tree? How can I see if the node is even there? Do I use the data-uid?
Help would be appreciated.