如何在表单中使用rocket_contrib::Uuid？

Question

我正在使用火箭和rocket_contrib的0.5.0-dev版本。我想在我的表单中使用Uuid，但是我得到了以下编译错误：

属性FromFormField<'\_>不是为rocket\_contrib::uuid::Uuid实现的

我不理解这一点，因为根据文档 Uuid implements FromFormField。我做错了什么？

#[macro_use]
extern crate rocket;

use rocket::data::TempFile;
use rocket::form::{DataField, Form};
use rocket_contrib::uuid::Uuid;

#[derive(FromForm)]
struct FileUploadForm<'v> {
    id: Uuid,
    file: TempFile<'v>,
}

#[post("/upload", data = "<data>")]
fn upload(data: Form<FileUploadForm>) -> Result<String, std::io::Error> {
    let id = "uuid".to_string();
    Ok(id)
}

fn rocket() -> rocket::Rocket {
    rocket::ignite().mount("/", routes![upload])
}

#[rocket::main]
async fn main() {
    rocket().launch().await;
}

Answer 1

我的Cargo.toml不正确，我没有正确地包含rocket_contrib。正确的版本如下

[package]
name = "stackoverflow"
version = "0.1.0"
edition = "2018"

[dependencies]
rocket = { git = "https://github.com/SergioBenitez/Rocket", version = "0.5.0-dev" }

[dependencies.rocket_contrib]
git = "https://github.com/SergioBenitez/Rocket"
version = "0.5.0-dev"
default-features = false
features = ["uuid"]