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 FromSql<Date, Sqlite> for String
• impl FromSql<Time, Sqlite> for String
• impl FromSql<Timestamp, Sqlite> for String
• impl FromSql<VarChar, Sqlite> for String
• impl FromSql<Binary, Sqlite> for Vec<u8>
• impl FromSql<SmallInt, Sqlite> for i16
• impl FromSql<Integer, Sqlite> for i32
• impl FromSql<Bool, Sqlite> for bool
• impl FromSql<BigInt, Sqlite> for i64
• impl FromSql<Float, Sqlite> for f32
• impl FromSql<Double, Sqlite> for f64