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 FromSql<Timestamp, 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