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derive_yaml.rs
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derive_yaml.rs
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use redis::{AsyncCommands, Client, ErrorKind, RedisError, RedisResult};
use redis_macros::{FromRedisValue, ToRedisArgs};
use serde::{Deserialize, Serialize};
/// Define structs to hold the data
/// Children structs don't have to implement FromRedisValue, ToRedisArgs, unless you want to use them as top level
/// They have to implement serde traits though!
#[derive(Debug, PartialEq, Serialize, Deserialize)]
enum Address {
Street(String),
Road(String),
}
/// Derive the traits and set the `redis_serializer` attrribute
#[derive(Debug, PartialEq, Serialize, Deserialize, FromRedisValue, ToRedisArgs)]
#[redis_serializer(serde_yaml)]
struct User {
id: u32,
name: String,
addresses: Vec<Address>,
}
/// This example shows how to use different serializer, in this example serde_yaml
#[tokio::main]
async fn main() -> RedisResult<()> {
// Open new async connection to localhost
let client = Client::open("redis://localhost:6379")?;
let mut con = client.get_async_connection().await.map_err(|_| {
RedisError::from((
ErrorKind::InvalidClientConfig,
"Cannot connect to localhost:6379. Try starting a redis-server process or container.",
))
})?;
// Define the data you want to store in Redis.
let user = User {
id: 1,
name: "Ziggy".to_string(),
addresses: vec![
Address::Street("Downing".to_string()),
Address::Road("Abbey".to_string()),
],
};
// Set and get back the user in YAML format, no problem
con.set("user_yaml", &user).await?;
let stored_user: User = con.get("user_yaml").await?;
assert_eq!(user, stored_user);
// If we get this out in string, it will be YAML
let stored_yaml: String = con.get("user_yaml").await?;
assert_eq!(
"id: 1
name: Ziggy
addresses:
- !Street Downing
- !Road Abbey
",
stored_yaml
);
Ok(())
}
#[test]
fn test_derive_yaml() {
assert_eq!(main(), Ok(()));
}