Trait diesel::serialize::ToSql

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. See MysqlType for details.
• For third party backends, consult that backend's documentation.

Required Methods

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

See the trait documentation.

Implementations on Foreign Types

impl<'a, A, T: ?Sized, DB> ToSql<A, DB> for &'a T where     DB: Backend,     T: ToSql<A, DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl ToSql<Date, Sqlite> for NaiveDate

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl ToSql<Time, Sqlite> for NaiveTime

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl ToSql<Timestamp, Sqlite> for NaiveDateTime

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl ToSql<Date, Sqlite> for str

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl ToSql<Date, Sqlite> for String

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl ToSql<Time, Sqlite> for str

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl ToSql<Time, Sqlite> for String

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl ToSql<Timestamp, Sqlite> for str

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl ToSql<Timestamp, Sqlite> for String

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl ToSql<Bool, Sqlite> for bool

fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> Result

impl<__DB> ToSql<Nullable<Timestamp>, __DB> for SystemTime where     __DB: Backend,     Self: ToSql<Timestamp, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Date>, __DB> for NaiveDate where     __DB: Backend,     Self: ToSql<Date, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Time>, __DB> for NaiveTime where     __DB: Backend,     Self: ToSql<Time, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Timestamp>, __DB> for NaiveDateTime where     __DB: Backend,     Self: ToSql<Timestamp, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<DB: Backend> ToSql<Float, DB> for f32

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<DB: Backend> ToSql<Double, DB> for f64

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<DB: Backend> ToSql<SmallInt, DB> for i16

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<DB: Backend> ToSql<Integer, DB> for i32

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<DB: Backend> ToSql<BigInt, DB> for i64

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<T, ST, DB> ToSql<Nullable<ST>, DB> for Option<T> where     T: ToSql<ST, DB>,     DB: Backend,     ST: NotNull,

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<__DB> ToSql<Nullable<Bool>, __DB> for bool where     __DB: Backend,     Self: ToSql<Bool, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<SmallInt>, __DB> for i16 where     __DB: Backend,     Self: ToSql<SmallInt, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Integer>, __DB> for i32 where     __DB: Backend,     Self: ToSql<Integer, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<BigInt>, __DB> for i64 where     __DB: Backend,     Self: ToSql<BigInt, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Float>, __DB> for f32 where     __DB: Backend,     Self: ToSql<Float, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Double>, __DB> for f64 where     __DB: Backend,     Self: ToSql<Double, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Text>, __DB> for String where     __DB: Backend,     Self: ToSql<Text, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Date>, __DB> for String where     __DB: Backend,     Self: ToSql<Date, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Time>, __DB> for String where     __DB: Backend,     Self: ToSql<Time, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Timestamp>, __DB> for String where     __DB: Backend,     Self: ToSql<Timestamp, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Text>, __DB> for str where     __DB: Backend,     Self: ToSql<Text, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Date>, __DB> for str where     __DB: Backend,     Self: ToSql<Date, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Time>, __DB> for str where     __DB: Backend,     Self: ToSql<Time, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Timestamp>, __DB> for str where     __DB: Backend,     Self: ToSql<Timestamp, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Binary>, __DB> for Vec<u8> where     __DB: Backend,     Self: ToSql<Binary, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<__DB> ToSql<Nullable<Binary>, __DB> for [u8] where     __DB: Backend,     Self: ToSql<Binary, __DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, __DB>) -> Result

impl<DB: Backend> ToSql<Text, DB> for str

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<DB> ToSql<Text, DB> for String where     DB: Backend,     str: ToSql<Text, DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<DB> ToSql<Binary, DB> for Vec<u8> where     DB: Backend,     [u8]: ToSql<Binary, DB>,

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<DB: Backend> ToSql<Binary, DB> for [u8]

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

impl<'a, T: ?Sized, ST, DB> ToSql<ST, DB> for Cow<'a, T> where     T: 'a + ToOwned + ToSql<ST, DB>,     DB: Backend,     Self: Debug,

fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result

Implementors