use std::io::prelude::*;
use crate::deserialize::{self, FromSql, FromSqlRow};
use crate::expression::AsExpression;
use crate::pg::{Pg, PgValue};
use crate::serialize::{self, IsNull, Output, ToSql};
use crate::sql_types::Uuid;
#[derive(AsExpression, FromSqlRow)]
#[diesel(foreign_derive)]
#[diesel(sql_type = Uuid)]
#[allow(dead_code)]
struct UuidProxy(uuid::Uuid);
#[cfg(all(feature = "postgres_backend", feature = "uuid"))]
impl FromSql<Uuid, Pg> for uuid::Uuid {
fn from_sql(value: PgValue<'_>) -> deserialize::Result<Self> {
uuid::Uuid::from_slice(value.as_bytes()).map_err(Into::into)
}
}
#[cfg(all(feature = "postgres_backend", feature = "uuid"))]
impl ToSql<Uuid, Pg> for uuid::Uuid {
fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Pg>) -> serialize::Result {
out.write_all(self.as_bytes())
.map(|_| IsNull::No)
.map_err(Into::into)
}
}
#[test]
fn uuid_to_sql() {
use crate::query_builder::bind_collector::ByteWrapper;
let mut buffer = Vec::new();
let bytes = [
0xFF_u8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
0x31, 0x32,
];
let test_uuid = uuid::Uuid::from_slice(&bytes).unwrap();
let mut bytes = Output::test(ByteWrapper(&mut buffer));
ToSql::<Uuid, Pg>::to_sql(&test_uuid, &mut bytes).unwrap();
assert_eq!(&buffer, test_uuid.as_bytes());
}
#[test]
fn some_uuid_from_sql() {
let bytes = [
0xFF_u8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
0x31, 0x32,
];
let input_uuid = uuid::Uuid::from_slice(&bytes).unwrap();
let output_uuid =
FromSql::<Uuid, Pg>::from_sql(PgValue::for_test(input_uuid.as_bytes())).unwrap();
assert_eq!(input_uuid, output_uuid);
}
#[test]
fn bad_uuid_from_sql() {
let uuid = uuid::Uuid::from_sql(PgValue::for_test(b"boom"));
assert!(uuid.is_err());
let error_message = uuid.unwrap_err().to_string();
assert!(error_message.starts_with("invalid"));
assert!(error_message.contains("length"));
assert!(error_message.contains("expected 16"));
assert!(error_message.ends_with("found 4"));
}
#[test]
fn no_uuid_from_sql() {
let uuid = uuid::Uuid::from_nullable_sql(None);
assert_eq!(
uuid.unwrap_err().to_string(),
"Unexpected null for non-null column"
);
}