Trait diesel::types::FromSql

pub trait FromSql<A, DB: Backend + HasSqlType<A>>: Sized {
    fn from_sql(
        bytes: Option<&DB::RawValue>
    ) -> Result<Self, Box<Error + Send + Sync>>;
}

How to deserialize a single field of a given type. The input will always be the binary representation, not the text.

Required Methods

fn from_sql(
    bytes: Option<&DB::RawValue>
) -> Result<Self, Box<Error + Send + Sync>>

Implementors

• impl<DB: Backend<RawValue = [u8]>> FromSql<Float, DB> for f32
• impl<DB: Backend<RawValue = [u8]>> FromSql<Double, DB> for f64
• impl<DB: Backend<RawValue = [u8]>> FromSql<SmallInt, DB> for i16
• impl<DB: Backend<RawValue = [u8]>> FromSql<Integer, DB> for i32
• impl<DB: Backend<RawValue = [u8]>> FromSql<BigInt, DB> for i64
• impl<T, ST, DB> FromSql<Nullable<ST>, DB> for Option<T> where
    T: FromSql<ST, DB>,
    DB: Backend + HasSqlType<ST>,
    ST: NotNull, 
• impl<DB: Backend<RawValue = [u8]>> FromSql<Text, DB> for String
• impl<DB: Backend<RawValue = [u8]>> FromSql<Binary, DB> for Vec<u8>
• impl<'a, T: ?Sized, ST, DB> FromSql<ST, DB> for Cow<'a, T> where
    T: 'a + ToOwned,
    DB: Backend + HasSqlType<ST>,
    T::Owned: FromSql<ST, DB>, 
• impl<T, ST> FromSql<Array<ST>, Pg> for Vec<T> where
    T: FromSql<ST, Pg>,
    Pg: HasSqlType<ST>, 
• impl<T, ST> FromSql<Range<ST>, Pg> for (Bound<T>, Bound<T>) where
    T: FromSql<ST, Pg>,
    Pg: HasSqlType<ST> + HasSqlType<Range<ST>>, 
• impl FromSql<Timestamp, Pg> for SystemTime
• impl FromSql<Timestamp, Pg> for PgTimestamp
• impl FromSql<Timestamptz, Pg> for PgTimestamp
• impl FromSql<Date, Pg> for PgDate
• impl FromSql<Time, Pg> for PgTime
• impl FromSql<Interval, Pg> for PgInterval
• impl FromSql<Numeric, Pg> for PgNumeric
• impl FromSql<Oid, Pg> for u32
• impl FromSql<Bool, Pg> for bool
• impl FromSql<Money, Pg> for PgMoney