Trait Key

pub trait Key<'a, T: Deserialize<'a> + Eq + Hash + Serialize> {
    // Required method
    fn key(&self) -> T;
}

The key to a keyed resource.

Implement this on the type of the value of a map to extract the key from it.

Examples

If you have a User resource, then it’ll have an ID of some sort. For example, return the integer ID of a User struct:

use serde_derive::{Deserialize, Serialize};
use serde_mappable_seq::Key;

struct User {
    id: u64,
    email: String,
    name: String,
}

impl Key<'_, u64> for User {
    fn key(&self) -> u64 {
        self.id
    }
}

Required Methods

fn key(&self) -> T

The method to extract an owned key from the type.

Implementors