diesel/pg/types/
uuid.rs

1use std::io::prelude::*;
2
3use crate::deserialize::{self, FromSql, FromSqlRow};
4use crate::expression::AsExpression;
5use crate::pg::{Pg, PgValue};
6use crate::serialize::{self, IsNull, Output, ToSql};
7use crate::sql_types::Uuid;
8
9#[derive(const _: () =
    {
        use diesel;
        impl<'__expr> diesel::expression::AsExpression<Uuid> for
            &'__expr uuid::Uuid {
            type Expression =
                diesel::internal::derives::as_expression::Bound<Uuid, Self>;
            fn as_expression(self)
                ->
                    <Self as
                    diesel::expression::AsExpression<Uuid>>::Expression {
                diesel::internal::derives::as_expression::Bound::new(self)
            }
        }
        #[diagnostic::do_not_recommend]
        impl<'__expr>
            diesel::expression::AsExpression<diesel::sql_types::Nullable<Uuid>>
            for &'__expr uuid::Uuid {
            type Expression =
                diesel::internal::derives::as_expression::Bound<diesel::sql_types::Nullable<Uuid>,
                Self>;
            fn as_expression(self)
                ->
                    <Self as
                    diesel::expression::AsExpression<diesel::sql_types::Nullable<Uuid>>>::Expression {
                diesel::internal::derives::as_expression::Bound::new(self)
            }
        }
        #[diagnostic::do_not_recommend]
        impl<'__expr, '__expr2> diesel::expression::AsExpression<Uuid> for
            &'__expr2 &'__expr uuid::Uuid {
            type Expression =
                diesel::internal::derives::as_expression::Bound<Uuid, Self>;
            fn as_expression(self)
                ->
                    <Self as
                    diesel::expression::AsExpression<Uuid>>::Expression {
                diesel::internal::derives::as_expression::Bound::new(self)
            }
        }
        #[diagnostic::do_not_recommend]
        impl<'__expr, '__expr2>
            diesel::expression::AsExpression<diesel::sql_types::Nullable<Uuid>>
            for &'__expr2 &'__expr uuid::Uuid {
            type Expression =
                diesel::internal::derives::as_expression::Bound<diesel::sql_types::Nullable<Uuid>,
                Self>;
            fn as_expression(self)
                ->
                    <Self as
                    diesel::expression::AsExpression<diesel::sql_types::Nullable<Uuid>>>::Expression {
                diesel::internal::derives::as_expression::Bound::new(self)
            }
        }
        impl<__DB>
            diesel::serialize::ToSql<diesel::sql_types::Nullable<Uuid>, __DB>
            for uuid::Uuid where __DB: diesel::backend::Backend,
            Self: diesel::serialize::ToSql<Uuid, __DB> {
            fn to_sql<'__b>(&'__b self,
                out: &mut diesel::serialize::Output<'__b, '_, __DB>)
                -> diesel::serialize::Result {
                diesel::serialize::ToSql::<Uuid, __DB>::to_sql(self, out)
            }
        }
        impl diesel::expression::AsExpression<Uuid> for uuid::Uuid {
            type Expression =
                diesel::internal::derives::as_expression::Bound<Uuid, Self>;
            fn as_expression(self)
                ->
                    <Self as
                    diesel::expression::AsExpression<Uuid>>::Expression {
                diesel::internal::derives::as_expression::Bound::new(self)
            }
        }
        impl diesel::expression::AsExpression<diesel::sql_types::Nullable<Uuid>>
            for uuid::Uuid {
            type Expression =
                diesel::internal::derives::as_expression::Bound<diesel::sql_types::Nullable<Uuid>,
                Self>;
            fn as_expression(self)
                ->
                    <Self as
                    diesel::expression::AsExpression<diesel::sql_types::Nullable<Uuid>>>::Expression {
                diesel::internal::derives::as_expression::Bound::new(self)
            }
        }
    };AsExpression, const _: () =
    {
        use diesel;
        impl<__DB, __ST> diesel::deserialize::Queryable<__ST, __DB> for
            uuid::Uuid where __DB: diesel::backend::Backend,
            __ST: diesel::sql_types::SingleValue,
            Self: diesel::deserialize::FromSql<__ST, __DB> {
            type Row = Self;
            fn build(row: Self) -> diesel::deserialize::Result<Self> {
                diesel::deserialize::Result::Ok(row)
            }
        }
    };FromSqlRow)]
10#[diesel(foreign_derive)]
11#[diesel(sql_type = Uuid)]
12#[allow(dead_code)]
13struct UuidProxy(uuid::Uuid);
14
15#[cfg(all(feature = "postgres_backend", feature = "uuid"))]
16impl FromSql<Uuid, Pg> for uuid::Uuid {
17    fn from_sql(value: PgValue<'_>) -> deserialize::Result<Self> {
18        uuid::Uuid::from_slice(value.as_bytes()).map_err(Into::into)
19    }
20}
21
22#[cfg(all(feature = "postgres_backend", feature = "uuid"))]
23impl ToSql<Uuid, Pg> for uuid::Uuid {
24    fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Pg>) -> serialize::Result {
25        out.write_all(self.as_bytes())
26            .map(|_| IsNull::No)
27            .map_err(Into::into)
28    }
29}
30
31#[cfg(test)]
32mod tests {
33    use super::*;
34    use crate::test_helpers::format_error;
35
36    #[diesel_test_helper::test]
37    fn uuid_to_sql() {
38        use crate::query_builder::bind_collector::ByteWrapper;
39
40        let mut buffer = Vec::new();
41        let bytes = [
42            0xFF_u8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
43            0x31, 0x32,
44        ];
45
46        let test_uuid = uuid::Uuid::from_slice(&bytes).unwrap();
47        let mut bytes = Output::test(ByteWrapper(&mut buffer));
48        ToSql::<Uuid, Pg>::to_sql(&test_uuid, &mut bytes).unwrap();
49        assert_eq!(&buffer, test_uuid.as_bytes());
50    }
51
52    #[diesel_test_helper::test]
53    fn some_uuid_from_sql() {
54        let bytes = [
55            0xFF_u8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
56            0x31, 0x32,
57        ];
58        let input_uuid = uuid::Uuid::from_slice(&bytes).unwrap();
59        let output_uuid =
60            <uuid::Uuid as FromSql<Uuid, Pg>>::from_sql(PgValue::for_test(input_uuid.as_bytes()))
61                .unwrap();
62        assert_eq!(input_uuid, output_uuid);
63    }
64
65    #[diesel_test_helper::test]
66    fn bad_uuid_from_sql() {
67        let uuid = uuid::Uuid::from_sql(PgValue::for_test(b"boom"));
68        assert!(uuid.is_err());
69        // The error message changes slightly between different
70        // uuid versions, so we just check on the relevant parts
71        // The exact error messages are either:
72        // "invalid bytes length: expected 16, found 4"
73        // or
74        // "invalid length: expected 16 bytes, found 4"
75        let error_message = format_error(&*uuid.unwrap_err());
76        assert!(error_message.starts_with("invalid"));
77        assert!(error_message.contains("length"));
78        assert!(error_message.contains("expected 16"));
79        assert!(error_message.ends_with("found 4"));
80    }
81
82    #[diesel_test_helper::test]
83    fn no_uuid_from_sql() {
84        let uuid = uuid::Uuid::from_nullable_sql(None);
85        assert_eq!(
86            format_error(&*uuid.unwrap_err()),
87            "Unexpected null for non-null column"
88        );
89    }
90}
diesel/pg/types/uuid.rs

diesel/pg/types/
uuid.rs
