Trait diesel::serialize::ToSql
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pub trait ToSql<A, DB: Backend>: Debug { fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result; }
Serializes a single value to be sent to the database.
The output is sent as a bind parameter, and the data must be written in the expected format for the given backend.
When possible, implementations of this trait should prefer using an existing
implementation, rather than writing to out
directly. (For example, if you
are implementing this for an enum, which is represented as an integer in the
database, you should use i32::to_sql(x, out)
instead of writing to out
yourself.
Any types which implement this trait should also #[derive(AsExpression)]
.
Backend specific details
- For PostgreSQL, the bytes will be sent using the binary protocol, not text.
- For SQLite, all implementations should be written in terms of an existing
ToSql
implementation. - For MySQL, the expected bytes will depend on the return value of
type_metadata
for the given SQL type. SeeMysqlType
for details. - For third party backends, consult that backend's documentation.
Required Methods
Implementations on Foreign Types
impl<'a, A, T: ?Sized, DB> ToSql<A, DB> for &'a T where
DB: Backend,
T: ToSql<A, DB>,
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DB: Backend,
T: ToSql<A, DB>,
impl ToSql<Datetime, Mysql> for MYSQL_TIME
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impl ToSql<Timestamp, Mysql> for MYSQL_TIME
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impl ToSql<Time, Mysql> for MYSQL_TIME
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impl ToSql<Date, Mysql> for MYSQL_TIME
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impl ToSql<Datetime, Mysql> for NaiveDateTime
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impl ToSql<Timestamp, Mysql> for NaiveDateTime
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impl ToSql<Time, Mysql> for NaiveTime
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impl ToSql<Date, Mysql> for NaiveDate
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impl ToSql<Numeric, Mysql> for BigDecimal
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impl ToSql<Tinyint, Mysql> for i8
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impl ToSql<Bool, Mysql> for bool
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impl<ST, T> ToSql<Array<ST>, Pg> for [T] where
Pg: HasSqlType<ST>,
T: ToSql<ST, Pg>,
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Pg: HasSqlType<ST>,
T: ToSql<ST, Pg>,
impl<ST, T> ToSql<Nullable<Array<ST>>, Pg> for [T] where
[T]: ToSql<Array<ST>, Pg>,
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[T]: ToSql<Array<ST>, Pg>,
impl<ST, T> ToSql<Array<ST>, Pg> for Vec<T> where
[T]: ToSql<Array<ST>, Pg>,
T: Debug,
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[T]: ToSql<Array<ST>, Pg>,
T: Debug,
impl<ST, T> ToSql<Nullable<Array<ST>>, Pg> for Vec<T> where
Vec<T>: ToSql<Array<ST>, Pg>,
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Vec<T>: ToSql<Array<ST>, Pg>,
impl<ST, T> ToSql<Range<ST>, Pg> for (Bound<T>, Bound<T>) where
T: ToSql<ST, Pg>,
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T: ToSql<ST, Pg>,
impl<ST, T> ToSql<Nullable<Range<ST>>, Pg> for (Bound<T>, Bound<T>) where
(Bound<T>, Bound<T>): ToSql<Range<ST>, Pg>,
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(Bound<T>, Bound<T>): ToSql<Range<ST>, Pg>,
impl ToSql<Timestamp, Pg> for SystemTime
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impl ToSql<Timestamp, Pg> for NaiveDateTime
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impl ToSql<Timestamptz, Pg> for NaiveDateTime
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impl<TZ: TimeZone> ToSql<Timestamptz, Pg> for DateTime<TZ>
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impl ToSql<Time, Pg> for NaiveTime
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impl ToSql<Date, Pg> for NaiveDate
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impl ToSql<Timestamp, Pg> for Timespec
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impl ToSql<MacAddr, Pg> for [u8; 6]
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impl ToSql<Inet, Pg> for IpNetwork
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impl ToSql<Cidr, Pg> for IpNetwork
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impl ToSql<Oid, Pg> for u32
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impl ToSql<Numeric, Pg> for BigDecimal
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impl ToSql<Bool, Pg> for bool
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impl ToSql<Uuid, Pg> for Uuid
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impl ToSql<Json, Pg> for Value
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impl ToSql<Jsonb, Pg> for Value
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impl ToSql<Date, Sqlite> for NaiveDate
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impl ToSql<Time, Sqlite> for NaiveTime
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impl ToSql<Timestamp, Sqlite> for NaiveDateTime
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impl ToSql<Date, Sqlite> for str
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impl ToSql<Date, Sqlite> for String
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impl ToSql<Time, Sqlite> for str
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impl ToSql<Time, Sqlite> for String
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impl ToSql<Timestamp, Sqlite> for str
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impl ToSql<Timestamp, Sqlite> for String
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impl ToSql<Bool, Sqlite> for bool
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impl<DB: Backend> ToSql<Float, DB> for f32
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impl<DB: Backend> ToSql<Double, DB> for f64
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impl<DB: Backend> ToSql<SmallInt, DB> for i16
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impl<DB: Backend> ToSql<Integer, DB> for i32
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impl<DB: Backend> ToSql<BigInt, DB> for i64
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impl<T, ST, DB> ToSql<Nullable<ST>, DB> for Option<T> where
T: ToSql<ST, DB>,
DB: Backend,
ST: NotNull,
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T: ToSql<ST, DB>,
DB: Backend,
ST: NotNull,
impl<DB: Backend> ToSql<Text, DB> for str
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impl<DB> ToSql<Text, DB> for String where
DB: Backend,
str: ToSql<Text, DB>,
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DB: Backend,
str: ToSql<Text, DB>,
impl<DB> ToSql<Binary, DB> for Vec<u8> where
DB: Backend,
[u8]: ToSql<Binary, DB>,
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DB: Backend,
[u8]: ToSql<Binary, DB>,
impl<DB: Backend> ToSql<Binary, DB> for [u8]
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impl<'a, T: ?Sized, ST, DB> ToSql<ST, DB> for Cow<'a, T> where
T: 'a + ToOwned + ToSql<ST, DB>,
DB: Backend,
T::Owned: ToSql<ST, DB>,
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T: 'a + ToOwned + ToSql<ST, DB>,
DB: Backend,
T::Owned: ToSql<ST, DB>,