How to Use String instead of ObjectId in "wither" Rust?

Question

I have this code here:

pub struct Account {
    #[serde(rename = "_id", skip_serializing_if = "Option::is_none")]
    pub id: Option<ObjectId>,
    pub email: String,
}

And I want to change "ObjectId" to String so I can use Ulid.

Answer 1

If you need String use

let str_id: String = account.id.unwrap().to_hex();