[bug] Failed to pass an enum as argument in command

[shadow3aaa]

Describe the bug

I have a command project_manager_create_project:

#[tauri::command]
pub fn project_manager_create_project(
    project_info: ProjectInfo,
    state: State<ProjectManagerWarpper>,
) {
    state
        .read()
        .project_infos
        .write()
        .infos
        .insert(project_info.name.clone(), project_info);
}

And I tried to invoke it like this:

invoke("project_manager_create_project", {
  projectInfo: projectInfo.value,
});

But it didn't work. So I open devtool and it prompts me with the error: Uncaught (in promise) invalid args 'projectInfo' for command 'project_manager_create_project': invalid type: integer '0', expected string or map.

I searched for a few issues, like #6566, which looks like the same issue. So I tried the following solution (marking enum with #[repr(u16)]) but it didn't work

ProjectInfo struct：

use serde::{Deserialize, Serialize};
#[derive(Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct ProjectInfo {
    pub name: String,
    pub template: Template,
}

#[derive(Serialize, Deserialize, Clone, Copy)]
#[serde(rename_all = "camelCase")]
pub enum Template {
    RustBinary,
    RustLibrary,
    Empty,
}

Reproduction

No response

Expected behavior

No response

Full tauri info output

❯ pnpm tauri info

> [email protected] tauri C:\Users\13940\Documents\GitHub\Codroid
> tauri "info"


[✔] Environment
    - OS: Windows 10.0.26120 X64
    ✔ WebView2: 126.0.2592.68
    ✔ MSVC: Visual Studio Community 2022
    ✔ rustc: 1.81.0-nightly (3cb521a43 2024-06-22)
    ✔ cargo: 1.81.0-nightly (bc89bffa5 2024-06-22)
    ✔ rustup: 1.27.1 (54dd3d00f 2024-04-24)
    ✔ Rust toolchain: nightly-x86_64-pc-windows-msvc (default)
    - node: 22.3.0
    - pnpm: 9.4.0
    - npm: 10.8.1

[-] Packages
    - tauri [RUST]: 2.0.0-beta.22
    - tauri-build [RUST]: 2.0.0-beta.17
    - wry [RUST]: 0.40.1
    - tao [RUST]: 0.28.1
    - @tauri-apps/api [NPM]: 2.0.0-beta.13
    - @tauri-apps/cli [NPM]: 2.0.0-beta.20

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist
    - devUrl: https://localhost:1420/
    - framework: Vue.js
    - bundler: Vite

Stack trace

No response

Additional context

No response

[amrbashir]

sounds like an issue in your frontend code, what is the value of projectInfo.value in your frontend code?
it should look something like this:

{
  name: "Project name",
  template: "rustBinary"
}

if it doesn't look like this, then your frontend is the issue, otherwise please provide a minimal repro and ping me

[shadow3aaa]

sounds like an issue in your frontend code, what is the value of projectInfo.value in your frontend code?
it should look something like this:

{
  name: "Project name",
  template: "rustBinary"
}

if it doesn't look like this, then your frontend is the issue, otherwise please provide a minimal repro and ping me

It's something like this:

enum Template {
  RustBinary,
  RustLibrary,
  ...
}

const projectInfo: ComputedRef<ProjectInfo> = computed(() => {
  const template =
    Template[projectTemplateInput.value as keyof typeof Template];
  return {
    name: projectName.value, // string
    template, // Template
  });

[amrbashir]

Typescript enums are not 1:1 equivalent of Rust enums, so you have to make sure they are equal, there is two ways you can do this:

1. use repr(u16) but will require usage of serde_repr crate so serialization/deserialization could work properly, see https://serde.rs/enum-number.html
2. change the typescript enum definition to match the serialization of rust enum, so it would look like this:

   enum Template {
     RustBinary = "rustBinary",
     RustLibrary = "rustLibrary",
     ...
   }

[shadow3aaa]

Typescript enums are not 1:1 equivalent of Rust enums, so you have to make sure they are equal, there is two ways you can do this:

1. use repr(u16) but will require usage of serde_repr crate so serialization/deserialization could work properly, see https://serde.rs/enum-number.html
2. change the typescript enum definition to match the serialization of rust enum, so it would look like this:

   enum Template {
     RustBinary = "rustBinary",
     RustLibrary = "rustLibrary",
     ...
   }

I have fixed it through the first way.
But I think this is really confusing for tauri user, maybe Tauri should provide a macro like #[derive(tauri::CommandArg)] to do these works(derive Serialize_repr, Deserialize_repr or Serialize, Deserialize traits, and add #[serde(rename_all = "camelCase")]) on-demand?

[amrbashir]

I think you're looking for https://github.com/oscartbeaumont/tauri-specta which generates typescript definitions for your based on your commands .