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

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

type QueryId = T::QueryId

fn has_static_query_id() -> bool

fn query_id() -> Option<TypeId>

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

type Sum = Nullable<T::Sum>

type Avg = Nullable<T::Avg>

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

fn default() -> Nullable<ST>

Returns the "default value" for a type.

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

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: Debug + NotNull> Debug for Nullable<ST>

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

Formats the value using the given formatter.

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

type Nullable = Nullable<T>