blog/backend/src/db/mod.rs

use anyhow::Result;
use diesel::pg::PgConnection;
use diesel::prelude::*;
use diesel::r2d2::{ConnectionManager, Pool};
use lazy_static::lazy_static;

use crate::config;

pub mod models;
pub mod schema;

pub type DbPool = Pool<ConnectionManager<PgConnection>>;
pub type Connection = PgConnection;

pub fn establish_connection() -> ConnectionResult<PgConnection> {
    use diesel::Connection;

    PgConnection::establish(&config::CONFIG.db_url)
}

pub fn pool() -> Result<DbPool> {
    Ok(
        Pool::builder().build(ConnectionManager::<PgConnection>::new(
            &config::CONFIG.db_url,
        ))?,
    )
}

lazy_static! {
    pub static ref POOL: DbPool = pool().unwrap();
}