Cleaner way to leverage serde renaming for nested elements

[oldgalileo]

After reading over the documentation of the Serialized provider, it seemed intuitively that it would allow you to do the following:

Expected behavior (non-functional)

#[derive(Debug, Serialize)]
struct Args {
    #[serde(rename = "database.max-connections")]
    pub database_max_connections: Option<u32>,
    #[serde(rename = "server.bind-address")]
    pub server_bind_address: Option<String>,
}

#[derive(Debug, Deserialize, Serialize)]
struct Config {
    database: DatabaseConfig,
    server: ServerConfig,
}

#[derive(Debug, Deserialize, Serialize)]
struct DatabaseConfig {
    pub host: String,
    pub port: u16,
    #[serde(rename = "max-connections")]
    pub max_connections: u32,
}

#[test]
fn test_override() {
    let args = Args {
        database_max_connections: Some(50),
        server_bind_address: Some("0.0.0.0".to_string()),
    };

    let config = Figment::from(Serialized::defaults(Config::default()))
        .merge(Serialized::from(&args, figment::Profile::Default))
        .extract::<Config>();

    assert_eq!(config.database.max_connections, 50);    
    assert_eq!(config.server.bind_address, "0.0.0.0");    
}

After reading over data, it looks like the best immediate solution to this is instead to do:

// the rest of the config 

#[derive(Debug, Serialize)]
struct Args {
    #[serde(rename = "database.max-connections")]
    pub database_max_connections: Option<u32>,
    #[serde(rename = "server.bind-address")]
    pub server_bind_address: Option<String>,
}

#[test]
fn test() {
    let args = Args {
        database_max_connections: Some(50),
        server_bind_address: Some("0.0.0.0".to_string()),
    };

    let mut figment = Figment::from(Serialized::defaults(Config::default()));
    
    let value = Value::serialize(&args).unwrap();
    if let Some(dict) = value.into_dict() {
        for (key, value) in dict.iter() {
            figment = figment.merge(Serialized::default(key, value));
        }
    }

    let config: Config = figment.extract().unwrap();
    
    assert_eq!(config.database.max_connections, 50);    
    assert_eq!(config.server.bind_address, "0.0.0.0");
}

Did I miss an easier way to accomplish this?