Using tokio::spawn w/ Bevy

[graceful geyser]

Hi, I'm trying spawn an async task in a Startup system using

tokio::spawn(async move { ... })

but I'm getting the error:

there is no reactor running, must be called from the context of a Tokio 1.x runtime

My main is annotated:

#[tokio::main]
async fn main() { ... }

I read on Reddit that it could be an issue with different Tokio versions, but my cargo tree looks fine(?):

cargo tree | grep tokio
│   ├── tokio v1.35.1
│   │   └── tokio-macros v2.2.0 (proc-macro)
│       │   ├── tokio v1.35.1 (*)
│       ├── tokio v1.35.1 (*)
│   ├── tokio v1.35.1 (*)
│   ├── tokio-tungstenite v0.21.0
│   │   ├── tokio v1.35.1 (*)
├── tokio v1.35.1 (*)
├── tokio-tungstenite v0.21.0 (*)
├── tokio-tungstenite-wasm v0.2.1
│   ├── tokio v1.35.1 (*)
│   └── tokio-tungstenite v0.20.1
│       ├── tokio v1.35.1 (*)

I imagine it's something very simple but I'm not even sure where to begin.

[wet merlin]

The problem is that bevy doesn't use tokio for its async runtime

There's a crate which does it though https://crates.io/crates/bevy-tokio-tasks

There isn't an official version for v0.12 yet, so you probably wanna use this fork: https://github.com/foxzool/bevy-tokio-tasks

[hearty iron]

Thanks! This works great in 0.13.

[hearty iron]

I am a little confused as to how I can (or even if I should) use the JoinHandle to return a DB connection to my Bevy World as a Resource, so that I can pass it into another background task when I want to transact. Is this the right way to keep alive a DB connection within the tokio runtime?