Rust cannot find derive macro `Serialize` in this scope

Wed, 22 May 2024 22:46:23 +1000

While trying out some Rust exercises, I came across the following error:

$ cargo run --bin iter2
   Compiling tutor-web-app-ssr v0.1.0 (/home/kenno/dev/rust/chapter7/ezytutors/tutor-web-app-ssr)
error: cannot find derive macro `Serialize` in this scope
  --> tutor-web-app-ssr/src/bin/iter2.rs:17:10
   |
17 | #[derive(Serialize, Deserialize)]
   |          ^^^^^^^^^
   |
note: `Serialize` is imported here, but it is only a trait, without a derive macro
  --> tutor-web-app-ssr/src/bin/iter2.rs:5:26
   |
5  | use serde::{Deserialize, Serialize};
   |                          ^^^^^^^^^

error: cannot find derive macro `Deserialize` in this scope
  --> tutor-web-app-ssr/src/bin/iter2.rs:17:21
   |
17 | #[derive(Serialize, Deserialize)]

<SNIP>

This happened because I didn’t specify the required dependency feature for serde crate. Here is what I had in Cargo.toml when the above error occurred:

Actix on Kenno's Open Note

Rust cannot find derive macro `Serialize` in this scope