Saya baru mengenal karat dan mencoba mencari di stackoverflow serta membaca dokumentasi serde https://docs.serde.rs/serde/trait.Serialize.html dan https://serde.rs/impl-serialize.html, tapi saya agak tersesat.

Saya ingin menggunakan Tera untuk menghasilkan html dan struct yang saya lewati tidak memiliki sifat yang serde::ser::Serializediterapkan dan saya mencoba menerapkannya tetapi tampaknya kurang tepat.

Dependensi Cargo.toml

serde = "1.0.115"
serde_derive = "1.0.115"
serde-xml-rs = "0.4.0"
tera = "0.7.2"

main.rs

extern crate tera;
#[macro_use]
extern crate serde_derive;
extern crate serde;

use tera::Context;
use serde::ser::{Serialize, SerializeStruct, Serializer};

#[derive(Serialize, Debug)]
struct Person {
    firstname: String,
    lastname: String,
    age: i32,
}

#[derive(Debug)]
struct Attendees {
    people: Vec<Person>,
    updatedOn: String,
    updatedBy: String,
}

impl Serialize for Attendees {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        let mut s = serializer.serialize_struct("Person", 3)?;
        s.serialize_field("people", &self.people)?;
        s.serialize_field("updatedOn", &self.updatedOn)?;
        s.serialize_field("updatedBy", &self.updatedBy)?;
        s.end()
    }
}

fn main() {
   let mut context = Context::new();
   let mut peeps: Vec<Person> = Vec::new();
   let mut attendees = Attendees {
      people: peeps,
      updatedOn: String::from("today"),
      updatedBy: String::from("someone"),
   };
   context.add("attendees", &attendees);
}

kompiler mengatakan:

mytest % cargo run      
   Compiling mytest v0.1.0 (/home/mike/mytest)
error[E0277]: the trait bound `Attendees: serde::ser::Serialize` is not satisfied
  --> src/main.rs:44:29
   |
44 |    context.add("attendees", &attendees);
   |                             ^^^^^^^^^^ the trait `serde::ser::Serialize` is not implemented for `Attendees`

error: aborting due to previous error

Saya jelas kehilangan sesuatu ... Adakah yang bisa membantu?

Sifat karat tidak puas

Jawaban