Stable variable

Developers Motoko
1

Hi!
I am sorry if as simple question, but I am migrating from relational databases thinking to ICP way :slight_smile:
My question is how to declare the below as a stable
var myData = HashMap.HashMap<Principal, [DataModel]>(0, Principal.equal, Principal.hash);

2

mo:base/HashMap is not a stable data structure so you can’t declare it with stable var. I suggest you use something like Mops • Motoko Package Manager instead