用于编辑层次结构的体系结构，具有多个用户的多个节点级别

I am building a module to edit a hierarchy of nodes. You can think of it as a very large directory structure with many levels of nested directories and files. The nodes for the hierarchy are stored in a relational database table. The only difference is that there is no such thing as a folder/directory. All nodes have the same characteristics. So a node has a parent that is also a node. And there is only one root node, and a node can only have one parent node, so no poly-hierarchies.I am building a module to edit a hierarchy of n