Raw Model Tree Structures with Materialized Paths

[silicahd]

https://docs.mongodb.com/manual/tutorial/model-tree-structures-with-materialized-paths/

I am curious how i would be able to run something like this.

db.categories.find( { path: /^,Books,/ } )

I am trying to build a category with parents but i cant seem to be able to use the belongs to and has many options.