Trait AsEnvStr

Source

pub trait AsEnvStr {
    // Required method
    fn as_env_str<T: EnvKey>(&self) -> String;
}

Expand description

AsEnvTypeStr is a trait that covert some type to a string with Key Type, which is the environment type. This trait can extend the existing configuration struct to get the environment type.

§Example

use env_type::types::{EnvType, EnvKey, AsEnvStr};
use std::collections::HashMap;

struct Config {
   map: HashMap<&'static str, String>,
}

impl AsEnvStr for Config {
  fn as_env_str<T: EnvKey>(&self) -> String {
     self.map.get(T::key()).map(|v|v.to_string()).unwrap_or_default()
 }
}
let mut map = HashMap::new();
map.insert("ENV", "test".to_string());
let config = Config {
  map,
};
assert_eq!("test", config.as_env_str::<EnvType>());