"there is no reactor running, must be called from the context of a Tokio 1.x runtime" 将 mongodb 2 与 actix-web 3 一起使用时

Question

我尝试使用 actix web 实现 mongodb。这是我的主要 class:

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    let db_helper = DbHelper::open_connection().await?;
    println!("Connected!");
     Ok(())
}

// my db helper
pub async fn open_connection() -> std::io::Result<DbHelper> {
    let client = Client::with_uri_str("mongodb://localhost:27017/").await.expect("connect to mongodb issue!");
    // List the names of the databases in that deployment.
    let databases = client.list_database_names(None, None).await.expect("Test error");
    for mongodb in databases {
        println!("{}", mongodb);
    }
    let database = client.database(DB_NAME);
    let db_helper = DbHelper {
        client,
        database,
    };
    Ok(db_helper)
}

当我尝试运行这段代码时，它给了我一个错误：

thread 'main' panicked at 'there is no reactor running, must be called from the context of a Tokio 1.x runtime',

问题出在这一行：let databases = client.list_database_names(None, None).await.expect("Test error");。我不知道这里发生了什么。如果我删除该行或将 actix_web::main 替换为 #[tokio::main]，它就可以工作。但是，actix web无法运行。

actix-web = "3"
mongodb = "2.0.0-beta.2"

Answer 1

问题是您将 Actix web 3.x 与 Tokio 1.x 和 mongoDB 客户端 2.x 一起使用。您需要使用 Actix web 4.x 才能与其他两个一起使用。

"there is no reactor running, must be called from the context of a Tokio 1.x runtime" 将 mongodb 2 与 actix-web 3 一起使用时

"there is no reactor running, must be called from the context of a Tokio 1.x runtime" when using mongodb 2 with actix-web 3

mongodb

rust

actix-web