Rust / Rocket：特征serde :: ser :: Serialize没有为struct实现

如何解决Rust / Rocket：特征serde :: ser :: Serialize没有为struct实现

我正在尝试使用Rocket创建一个简单的终结点。我的Cargo.toml具有以下依赖性：

[dependencies]
rocket = "0.4.2"
rocket_codegen = "0.4.2"
rocket_contrib = "0.4.2"

main.rs如下：

#[macro_use]
extern crate rocket;

use rocket_contrib::json::Json;
use serde::Serialize;

#[get("/org")]
fn getorg() -> Json<Org> {
    Json(Org {
        id: Option::from(25),name: "Incredible-Customer".to_string(),})
}
#[derive(Serialize)]
pub struct Org {
    pub id: Option<i32>,pub name: String,}

fn main() {
    rocket::ignite().mount("/",routes![getorg]).launch();
}

编译会导致错误：

error[E0432]: unresolved import `serde`
 --> src/main.rs:3:5
  |
3 | use serde::Serialize;
  |     ^^^^^ use of undeclared crate or module `serde`

error: cannot determine resolution for the derive macro `Serialize`
  --> src/main.rs:14:10
   |
14 | #[derive(Serialize)]
   |          ^^^^^^^^^
   |
   = note: import resolution is stuck,try simplifying macro imports

error[E0658]: `macro` is experimental
 --> src/main.rs:7:1
  |
7 | #[get("/org")]
  | ^^^^^^^^^^^^^^
  |
  = note: see issue #39412 <https://github.com/rust-lang/rust/issues/39412> for more information
  = help: add `#![feature(decl_macro)]` to the crate attributes to enable
  = note: this error originates in an attribute macro (in Nightly builds,run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `Org: serde::ser::Serialize` is not satisfied
   --> src/main.rs:8:16
    |
8   | fn getorg() -> Json<Org> {
    |                ^^^^^^^^^ the trait `serde::ser::Serialize` is not implemented for `Org`
    |
   ::: /Users/shep/.cargo/registry/src/github.com-1ecc6299db9ec823/rocket-0.4.5/src/handler.rs:202:20
    |
202 |     pub fn from<T: Responder<'r>>(req: &Request,responder: T) -> Outcome<'r> {
    |                    ------------- required by this bound in `handler::<impl rocket::Outcome<rocket::Response<'r>,rocket::http::Status,rocket::Data>>::from`
    |
    = note: required because of the requirements on the impl of `Responder<'_>` for `rocket_contrib::json::Json<Org>

对于如何调查此错误，我感到非常困惑。这是一个依赖问题吗？为什么？我已经将rocket依赖项版本化为相同的依赖项，但是显然，此serde依赖项是令人不快的。谷歌搜索声称这是我的依赖项中的一个版本不匹配-但是我该如何自己解决这个问题？

解决方法

将serde = {version = "1.0",features = ["derive"]}和serde_json = {version = "1.0"}添加到您的cargo.toml中，以便能够从Serialize和Deserialize

派生