rust - 访问 impl 模块时出现 "use of undeclared type or module"

Question

我有这个模块:
src/adapters.rs

use super::db::{init_connection, models};
use actix_web::Responder;
use diesel::r2d2::{ConnectionManager, Pool};
use diesel::MysqlConnection;

pub struct Basic {
   pool: Pool<ConnectionManager<MysqlConnection>>,
}

impl Basic {

    pub fn new() -> Basic {
        Basic {
            pool: init_connection().unwrap(),
        }
    }

    pub async fn admin_index(&self) -> impl Responder {
        "API Admin"
    }
}

我想从模块中调用实例方法 admin_index :
src/routes.rs
像这样:

use actix_web::{web, HttpResponse, Responder};
use super::adapters::Basic;

pub fn create(app: &mut web::ServiceConfig) {

    let basicAdapters = Basic::new();

    app
        .service(web::resource("/").to(|| HttpResponse::Ok().body("index")))
        .service(
            web::scope("/api")
                .service(
                    bweb::scope("/admin")
                        .route("/", web::get().to(basicAdapters::admin_index))
                )
}

但我不断得到:

error[E0433]: failed to resolve: use of undeclared type or module `basicAdapters`

.route("/", web::get().to(basicAdapters::admin_index))
                          ^^^^^^^^^^^^^ use of undeclared type or module `basicAdapters`

我不明白为什么会收到此错误消息，因为 basicAdapters 显然是由

let basicAdapters = Basic::new();

任何帮助表示赞赏。

Answer 1

::是命名空间解析运算符，basicAdapters不是命名空间。
要对值调用方法，请使用 .运算符(operator):

web::get().to(basicAdapters.admin_index())