我正在使用actix-web编写服务器:
use actix_web::{post, web, Responder};
use serde::Deserialize;
#[derive(Deserialize)]
struct UserModel<'a, 'b> {
username: &'a str,
password: &'b str,
}
#[post("/")]
pub fn register(user_model: web::Json<UserModel>) -> impl Responder {}
编译器给出此错误:
error: implementation of `user::_IMPL_DESERIALIZE_FOR_UserModel::_serde::Deserialize` is not general enough
--> src/user.rs:31:1
|
31 | #[post("/")]
| ^^^^^^^^^^^^
|
= note: `user::UserModel<'_, '_>` must implement `user::_IMPL_DESERIALIZE_FOR_UserModel::_serde::Deserialize<'0>`, for any lifetime `'0`
= note: but `user::UserModel<'_, '_>` actually implements `user::_IMPL_DESERIALIZE_FOR_UserModel::_serde::Deserialize<'1>`, for some specific lifetime `'1`
我应该如何解决?
答案 0 :(得分:7)
来自the actix-web
documentation:
impl<T> FromRequest for Json<T>
where
T: DeserializeOwned + 'static,
它基本上说,如果您想Json
从请求中提取类型,则只能使用拥有actix-web
类型的拥有的数据,而不能借用这些数据。因此,您必须在此处使用String
:
use actix_web::{post, web, Responder};
use serde::Deserialize;
#[derive(Deserialize)]
struct UserModel {
username: String,
password: String,
}
#[post("/")]
pub fn register(user_model: web::Json<UserModel>) -> impl Responder {
unimplemented!()
}