`.env` variables

[korir248]

Hi, I'm trying to use the config crate in my project and can't seem to make nested env variables work Could you please upload a .env,example to see how you are working with the separators.

#[derive(Debug, Deserialize)]
pub struct AppConfig {
    pub database: DatabaseConfig,
    pub upload: UploadConfig,
    pub salt: String,
}

#[derive(Debug, Deserialize)]
pub struct UploadConfig {
    pub max_file_size: usize,
    pub allowed_types: Vec<String>,
    pub storage_prefix: String,
}
#[derive(Debug, Deserialize)]
pub struct DatabaseConfig {
    pub url: String,
}

impl AppConfig {
    pub fn from_env() -> Result<AppConfig, ConfigError> {
        let config = Config::builder()
            .add_source(Environment::default().separator("_").try_parsing(true))
            .add_source(
                Environment::with_prefix("UPLOAD")
                    .prefix_separator("_")
                    .separator("_")
                    .try_parsing(true)
                    .with_list_parse_key("ALLOWED_TYPES"),
            )
            .build()?;

        // println!("Config values: {:#?}", config);

        config.try_deserialize()
    }
}

with my .env having

DATABASE_URL=
SALT=
UPLOAD_MAX_FILE_SIZE=
UPLOAD_ALLOWED_TYPES=
UPLOAD_STORAGE_PREFIX=