diesel/pg/types/
mac_addr.rs

1use std::io::prelude::*;
2
3use crate::deserialize::{self, FromSql};
4use crate::pg::{Pg, PgValue};
5use crate::serialize::{self, IsNull, Output, ToSql};
6use crate::sql_types::MacAddr;
7
8#[allow(dead_code)]
9mod foreign_derives {
10    use super::*;
11    use crate::deserialize::FromSqlRow;
12    use crate::expression::AsExpression;
13
14    #[derive(AsExpression, FromSqlRow)]
15    #[diesel(foreign_derive)]
16    #[diesel(sql_type = MacAddr)]
17    struct ByteArrayProxy([u8; 6]);
18}
19
20#[cfg(feature = "postgres_backend")]
21impl FromSql<MacAddr, Pg> for [u8; 6] {
22    fn from_sql(value: PgValue<'_>) -> deserialize::Result<Self> {
23        value
24            .as_bytes()
25            .try_into()
26            .map_err(|_| "invalid network address format: input isn't 6 bytes.".into())
27    }
28}
29
30#[cfg(feature = "postgres_backend")]
31impl ToSql<MacAddr, Pg> for [u8; 6] {
32    fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Pg>) -> serialize::Result {
33        out.write_all(&self[..])
34            .map(|_| IsNull::No)
35            .map_err(Into::into)
36    }
37}
38
39#[cfg(test)]
40#[diesel_test_helper::test]
41fn macaddr_roundtrip() {
42    use crate::query_builder::bind_collector::ByteWrapper;
43
44    let mut buffer = Vec::new();
45    let mut bytes = Output::test(ByteWrapper(&mut buffer));
46    let input_address = [0x52, 0x54, 0x00, 0xfb, 0xc6, 0x16];
47    ToSql::<MacAddr, Pg>::to_sql(&input_address, &mut bytes).unwrap();
48    let output_address: [u8; 6] = FromSql::from_sql(PgValue::for_test(&buffer)).unwrap();
49    assert_eq!(input_address, output_address);
50}
diesel/pg/types/mac_addr.rs

diesel/pg/types/
mac_addr.rs
