The major gist with Rust is that you only build `structs` with the basic data, and very important, stick things together with `traits` and/or `enums`.

So, for my eCommerce app I have something like

  struct Line {
    order_id: usize,
    product_name: String
  }

  
  struct Order {
    order_id: usize,
    customer: Customer,
    lines: Vec<Lines>
  }

And this means instead of pointers, using ids (alike RDBMS) is much nicer overall (work wonders that the data is already like that in RDBMS!).

You can avoid ids and just embed the data too.

Following the idea of think like in databases, when you need to find fast bring a HashMap/BtreeMap:

  struct Line {
    order_id: usize,
    product_name: String
  }

  
  struct Order {
    order_id: usize,
    customer: Customer,
    lines: BtreeMap<usize, Lines> <-- BTree nice for ordered data and range queries!
  }