Trait WrapNullable 

pub trait WrapNullable<N: Nullability>: Sealed<N> {
    type Output;
}

Idempotently wrap a SQL type as nullable-or-not depending on a Nullability marker, without double-wrapping an already-Nullable<T> column. Column accessors compose this with Find::Nullability so that NULL-ability is derived from join shape rather than requiring a manual .nullable() assertion (diesel’s documented wart).

Required Associated Types

type Output

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl WrapNullable<MaybeNull> for BigInt

type Output = Nullable<BigInt>

impl WrapNullable<MaybeNull> for Bool

type Output = Nullable<Bool>

impl WrapNullable<MaybeNull> for Bytes

type Output = Nullable<Bytes>

impl WrapNullable<MaybeNull> for Date

type Output = Nullable<Date>

impl WrapNullable<MaybeNull> for Integer

type Output = Nullable<Integer>

impl WrapNullable<MaybeNull> for Numeric

type Output = Nullable<Numeric>

impl WrapNullable<MaybeNull> for Real

type Output = Nullable<Real>

impl WrapNullable<MaybeNull> for Text

type Output = Nullable<Text>

impl WrapNullable<MaybeNull> for Timestamptz

type Output = Nullable<Timestamptz>

impl WrapNullable<MaybeNull> for Uuid

type Output = Nullable<Uuid>

impl<T> WrapNullable<MaybeNull> for Nullable<T>

type Output = Nullable<T>

impl<T> WrapNullable<NotNull> for T

type Output = T