Trait IsNullable 

pub trait IsNullable {
    const IS_NULLABLE: bool;
}

Helper trait that is used to mark if a type could be NULL on the SQL side.

Required Associated Constants

const IS_NULLABLE: bool

Is this type nullable

Dyn Compatibility

This trait is not dyn compatible.

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

Implementations on Foreign Types

impl IsNullable for String

const IS_NULLABLE: bool = false

impl IsNullable for bool

const IS_NULLABLE: bool = false

impl IsNullable for char

const IS_NULLABLE: bool = false

impl IsNullable for f32

const IS_NULLABLE: bool = false

impl IsNullable for f64

const IS_NULLABLE: bool = false

impl IsNullable for i8

const IS_NULLABLE: bool = false

impl IsNullable for i16

const IS_NULLABLE: bool = false

impl IsNullable for i32

const IS_NULLABLE: bool = false

impl IsNullable for i64

const IS_NULLABLE: bool = false

impl IsNullable for u8

const IS_NULLABLE: bool = false

impl IsNullable for u16

const IS_NULLABLE: bool = false

impl IsNullable for u32

const IS_NULLABLE: bool = false

impl IsNullable for u64

const IS_NULLABLE: bool = false

impl<T: IsNullable> IsNullable for Vec<T>

const IS_NULLABLE: bool = T::IS_NULLABLE

impl<T> IsNullable for Option<T>

const IS_NULLABLE: bool = true

Implementors