database config just work with `default` and `global`

[icode]

Rocket Version

0.5.1

Operating System

macOS 15.4.1

Rust Toolchain Version

rustc 1.86.0 (05f9846f8 2025-03-31)

What happened?

database pool config can not read [debug] config. just support [default],[global].

Test Case

use rocket::fairing::{self, AdHoc};
use rocket::{Build, Rocket};

use rocket_db_pools::{sqlx, Database};

#[derive(Database)]
#[database("postgres")]
struct Db(sqlx::PgPool);

async fn run_migrations(rocket: Rocket<Build>) -> fairing::Result {
    match Db::fetch(&rocket) {
        Some(db) => match sqlx::migrate!("src/sqlx/migrations").run(&**db).await {
            Ok(_) => Ok(rocket),
            Err(e) => {
                error!("Failed to initialize SQLx database: {}", e);
                Err(rocket)
            }
        },
        None => Err(rocket),
    }
}

pub trait ConfigureDbRocket {
    fn configure_db(self) -> Self;
}

impl ConfigureDbRocket for Rocket<Build> {
    fn configure_db(self) -> Self {
        self.attach(Db::init())
            .attach(AdHoc::try_on_ignite("SQLx Migrations", run_migrations))
    }
}

#[launch]
fn rocket() -> _ {
    rocket::custom(Config::default_figment())
        .attach(AdHoc::config::<rocket::Config>())
        .attach(AdHoc::config::<Config>())
        .configure_db()
}

Log Output

Error: failed to initialize database: bad configuration: missing field `url`
Error: Attempted to fetch unattached database `moke::sqlx::Db`.
   >> `moke::sqlx::Db::init()` fairing must be attached prior to using this database.
Error: failed to initialize database: bad configuration: missing field `url`
Error: Rocket failed to launch due to failing fairings:
   >> 'postgres' Database Pool
   >> SQLx Migrations
   >> 'redis' Database Pool

thread 'main' panicked at /Users/icode/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rocket-0.5.1/src/error.rs:279:9:
aborting due to fairing failure(s)
stack backtrace:
   0: rust_begin_unwind
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/std/src/panicking.rs:695:5
   1: core::panicking::panic_fmt
             at /rustc/05f9846f893b09a1be1fc8560e33fc3c815cfecb/library/core/src/panicking.rs:75:14
   2: core::panicking::panic_display
             at /Volumes/Data/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/panicking.rs:261:5
   3: <rocket::error::Error as core::ops::drop::Drop>::drop::panic_cold_display
             at /Volumes/Data/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/panic.rs:100:13
   4: <rocket::error::Error as core::ops::drop::Drop>::drop
             at /Users/icode/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rocket-0.5.1/src/error.rs:279:9
   5: core::ptr::drop_in_place<rocket::error::Error>
             at /Volumes/Data/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523:1
   6: core::ptr::drop_in_place<core::result::Result<rocket::rkt::Rocket<rocket::phase::Ignite>,rocket::error::Error>>
             at /Volumes/Data/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523:1
   7: moke::main
             at ./backend/src/main.rs:62:1
   8: core::ops::function::FnOnce::call_once
             at /Volumes/Data/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

Additional Context

No response

System Checks

• My bug report relates to functionality.
• I have tested against the latest Rocket release or a recent git commit.
• I have tested against the latest stable rustc toolchain.
• I was unable to find this issue previously reported.

[the10thWiz]

Error: failed to initialize database: bad configuration: missing field url

It looks like it can't find the url value for your db. To debug this issue, I'd need to know more information about your Config type, and how you're setting up the figment provider. However, my first guess is that you aren't setting the profile at all. Rocket doesn't set the profile for you in a custom config (It's part of the Figment provider instead). Rocket's default provider looks like this:

Figment::from(Config::default())
    .merge(Toml::file(Env::var_or("ROCKET_CONFIG", "Rocket.toml")).nested())
    .merge(Env::prefixed("ROCKET_").ignore(&["PROFILE"]).global())
    .select(Profile::from_env_or("ROCKET_PROFILE", Self::DEFAULT_PROFILE))

You might want to do something similar.

[icode]

yes, i use like this:

Figment::from(Config::default())
    .merge(Toml::file(Env::var_or("ROCKET_CONFIG", "Rocket.toml")).nested())
    .merge(Env::prefixed("ROCKET_").ignore(&["PROFILE"]).global())
    .select(Profile::from_env_or("ROCKET_PROFILE", Self::DEFAULT_PROFILE))

and is use ROCKET_PROFILE="debug" evn var