Struct diesel::types::Nullable

pub struct Nullable<ST: NotNull>(_);

The nullable SQL type.

This wraps another SQL type to indicate that it can be null. By default all values are assumed to be NOT NULL.

ToSql impls

• Any T which implements ToSql<ST>
• Option<T> for any T which implements ToSql<ST>

FromSql impls

• Option<T> for any T which implements FromSql<ST>

Trait Implementations

impl Add for Nullable<SmallInt>

type Rhs = Nullable<SmallInt>

The SQL type which can be added to this one

type Output = Nullable<SmallInt>

The SQL type of the result of adding Rhs to Self

impl Sub for Nullable<SmallInt>

type Rhs = Nullable<SmallInt>

The SQL type which can be subtracted from this one

type Output = Nullable<SmallInt>

The SQL type of the result of subtracting Rhs from Self

impl Mul for Nullable<SmallInt>

type Rhs = Nullable<SmallInt>

The SQL type which this can be multiplied by

type Output = Nullable<SmallInt>

The SQL type of the result of multiplying Self by Rhs

impl Div for Nullable<SmallInt>

type Rhs = Nullable<SmallInt>

The SQL type which this one can be divided by

type Output = Nullable<SmallInt>

The SQL type of the result of dividing Self by Rhs

impl Add for Nullable<Integer>

type Rhs = Nullable<Integer>

The SQL type which can be added to this one

type Output = Nullable<Integer>

The SQL type of the result of adding Rhs to Self

impl Sub for Nullable<Integer>

type Rhs = Nullable<Integer>

The SQL type which can be subtracted from this one

type Output = Nullable<Integer>

The SQL type of the result of subtracting Rhs from Self

impl Mul for Nullable<Integer>

type Rhs = Nullable<Integer>

The SQL type which this can be multiplied by

type Output = Nullable<Integer>

The SQL type of the result of multiplying Self by Rhs

impl Div for Nullable<Integer>

type Rhs = Nullable<Integer>

The SQL type which this one can be divided by

type Output = Nullable<Integer>

The SQL type of the result of dividing Self by Rhs

impl Add for Nullable<BigInt>

type Rhs = Nullable<BigInt>

The SQL type which can be added to this one

type Output = Nullable<BigInt>

The SQL type of the result of adding Rhs to Self

impl Sub for Nullable<BigInt>

type Rhs = Nullable<BigInt>

The SQL type which can be subtracted from this one

type Output = Nullable<BigInt>

The SQL type of the result of subtracting Rhs from Self

impl Mul for Nullable<BigInt>

type Rhs = Nullable<BigInt>

The SQL type which this can be multiplied by

type Output = Nullable<BigInt>

The SQL type of the result of multiplying Self by Rhs

impl Div for Nullable<BigInt>

type Rhs = Nullable<BigInt>

The SQL type which this one can be divided by

type Output = Nullable<BigInt>

The SQL type of the result of dividing Self by Rhs

impl Add for Nullable<Float>

type Rhs = Nullable<Float>

The SQL type which can be added to this one

type Output = Nullable<Float>

The SQL type of the result of adding Rhs to Self

impl Sub for Nullable<Float>

type Rhs = Nullable<Float>

The SQL type which can be subtracted from this one

type Output = Nullable<Float>

The SQL type of the result of subtracting Rhs from Self

impl Mul for Nullable<Float>

type Rhs = Nullable<Float>

The SQL type which this can be multiplied by

type Output = Nullable<Float>

The SQL type of the result of multiplying Self by Rhs

impl Div for Nullable<Float>

type Rhs = Nullable<Float>

The SQL type which this one can be divided by

type Output = Nullable<Float>

The SQL type of the result of dividing Self by Rhs

impl Add for Nullable<Double>

type Rhs = Nullable<Double>

The SQL type which can be added to this one

type Output = Nullable<Double>

The SQL type of the result of adding Rhs to Self

impl Sub for Nullable<Double>

type Rhs = Nullable<Double>

The SQL type which can be subtracted from this one

type Output = Nullable<Double>

The SQL type of the result of subtracting Rhs from Self

impl Mul for Nullable<Double>

type Rhs = Nullable<Double>

The SQL type which this can be multiplied by

type Output = Nullable<Double>

The SQL type of the result of multiplying Self by Rhs

impl Div for Nullable<Double>

type Rhs = Nullable<Double>

The SQL type which this one can be divided by

type Output = Nullable<Double>

The SQL type of the result of dividing Self by Rhs

impl Add for Nullable<Numeric>

type Rhs = Nullable<Numeric>

The SQL type which can be added to this one

type Output = Nullable<Numeric>

The SQL type of the result of adding Rhs to Self

impl Sub for Nullable<Numeric>

type Rhs = Nullable<Numeric>

The SQL type which can be subtracted from this one

type Output = Nullable<Numeric>

The SQL type of the result of subtracting Rhs from Self

impl Mul for Nullable<Numeric>

type Rhs = Nullable<Numeric>

The SQL type which this can be multiplied by

type Output = Nullable<Numeric>

The SQL type of the result of multiplying Self by Rhs

impl Div for Nullable<Numeric>

type Rhs = Nullable<Numeric>

The SQL type which this one can be divided by

type Output = Nullable<Numeric>

The SQL type of the result of dividing Self by Rhs

impl Add for Nullable<Time>

type Rhs = Nullable<Interval>

The SQL type which can be added to this one

type Output = Nullable<Time>

The SQL type of the result of adding Rhs to Self

impl Sub for Nullable<Time>

type Rhs = Nullable<Interval>

The SQL type which can be subtracted from this one

type Output = Nullable<Time>

The SQL type of the result of subtracting Rhs from Self

impl Add for Nullable<Date>

type Rhs = Nullable<Interval>

The SQL type which can be added to this one

type Output = Nullable<Timestamp>

The SQL type of the result of adding Rhs to Self

impl Sub for Nullable<Date>

type Rhs = Nullable<Interval>

The SQL type which can be subtracted from this one

type Output = Nullable<Timestamp>

The SQL type of the result of subtracting Rhs from Self

impl Add for Nullable<Timestamp>

type Rhs = Nullable<Interval>

The SQL type which can be added to this one

type Output = Nullable<Timestamp>

The SQL type of the result of adding Rhs to Self

impl Sub for Nullable<Timestamp>

type Rhs = Nullable<Interval>

The SQL type which can be subtracted from this one

type Output = Nullable<Timestamp>

The SQL type of the result of subtracting Rhs from Self

impl<T: SqlOrd + NotNull> SqlOrd for Nullable<T>

impl<T> QueryId for Nullable<T> where
    T: QueryId + NotNull, 

type QueryId = T::QueryId

A type which uniquely represents Self in a SQL query.

const HAS_STATIC_QUERY_ID: bool

HAS_STATIC_QUERY_ID: bool = <T>::HAS_STATIC_QUERY_ID

Can the SQL generated by Self be uniquely identified by its type?

fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise.

impl<T> Foldable for Nullable<T> where
    T: Foldable + NotNull, 

type Sum = T::Sum

The SQL type of sum(this_type)

type Avg = T::Avg

The SQL type of avg(this_type)

impl<ST: Debug + NotNull> Debug for Nullable<ST>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<ST: Clone + NotNull> Clone for Nullable<ST>

fn clone(&self) -> Nullable<ST>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<ST: Copy + NotNull> Copy for Nullable<ST>

impl<ST: Default + NotNull> Default for Nullable<ST>

fn default() -> Nullable<ST>

Returns the "default value" for a type.

impl<T: NotNull> IntoNullable for Nullable<T>

type Nullable = Nullable<T>

The nullable representation of this type.

impl<T: NotNull + SingleValue> SingleValue for Nullable<T>