55 lines
1.5 KiB
Rust
55 lines
1.5 KiB
Rust
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use diesel::pg::PgConnection;
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use diesel::{r2d2, Connection};
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use diesel::r2d2::{PooledConnection, ConnectionManager};
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use rocket::{Outcome, Request, State};
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use rocket::http::Status;
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use rocket::request::{self, FromRequest};
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use std::env;
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use std::ops::Deref;
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use crate::utils::errors::{Error, ErrorCode};
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pub type Pool = r2d2::Pool<ConnectionManager<PgConnection>>;
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pub fn pool() -> Pool {
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let manager = ConnectionManager::<PgConnection>::new(database_url());
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Pool::new(manager).expect("db pool")
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}
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fn database_url() -> String {
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env::var("DATABASE_URL").expect("DATABASE_URL must be set")
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}
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pub fn pg_connection() -> PgConnection {
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PgConnection::establish(database_url().as_str()).unwrap()
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}
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pub struct DbConn(pub r2d2::PooledConnection<ConnectionManager<PgConnection>>);
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impl<'a, 'r> FromRequest<'a, 'r> for DbConn {
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type Error = ();
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fn from_request(request: &'a Request<'r>) -> request::Outcome<DbConn, Self::Error> {
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let pool = request.guard::<State<Pool>>()?;
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match pool.get() {
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Ok(conn) => Outcome::Success(DbConn(conn)),
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Err(_) => Outcome::Failure((Status::ServiceUnavailable, ())),
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}
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}
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}
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impl Deref for DbConn {
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type Target = PgConnection;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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pub fn get_connection(pool: &Pool) -> Result<PooledConnection<ConnectionManager<PgConnection>>, Error> {
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let result = pool.get();
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if let Err(e) = result {
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return Err(Error::custom(ErrorCode::DatabaseError, e.to_string()));
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}
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Ok(result.unwrap())
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}
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