Matching versions for CORS and Transform not implemented

[fgadaleta]

Due to a requirement for GraphQL I need actix-web = { version = "4.0.0-beta.11", default-features = false } to be in Cargo.toml.

However, I also need actix-cors and wrap cors configuration in

HttpServer::new(move || {
            let cors = Cors::default()
              .allowed_origin("https://www.whatever.org/")
              .allowed_origin_fn(|origin, _req_head| {
                  origin.as_bytes().ends_with(b".rust-lang.org")
              })
              .allowed_methods(vec!["GET", "POST"])
              .allowed_headers(vec![header::AUTHORIZATION, header::ACCEPT])
              .allowed_header(header::CONTENT_TYPE)
              .supports_credentials()
              .max_age(3600);


            App::new()
                .wrap(cors)
                .app_data(Data::new(schema.clone()))
                .service(web::resource("/").guard(guard::Post()).to(index))
                .service(web::resource("/").guard(guard::Get()).to(index_playground))
        })
        .bind(format!("{}:{}", self.server_address, self.server_port))
        .unwrap()
        .run()
        .await
    }

But I am getting

143 |                 .wrap(cors)
    |                  ---- ^^^^ the trait `Transform<actix_web::app_service::AppRouting, ServiceRequest>` is not implemented for `Cors`
    |                  |
    |                  required by a bound introduced by this call
    
    ```

How would you proceed in such a scenario?

[fgadaleta]

I guess using
actix-cors = "0.6.0-beta.4"

[lordsarcastic]

Please I do not understand this answer. Does it mean they should use 0.6.0-beta.4 or the bug is happening because a beta version is used?

[robjtede]

During the beta period, the service trait was changed/upgraded.

You should not see mismatched trait errors using all latest stable versions.

[lordsarcastic]

Oh, sounds good. For me, it was a case of using a version of actix-cors that relied on a different version of actix-web. Thank you.