Enum DefaultKind 

pub enum DefaultKind {
    Static(Value),
    Now,
    Uuid,
    Sequence(String),
    CustomName(String),
}

How a default value is produced when a row omits a column.

Variants

Static(Value)

A fixed JSON value written literally.

Now

The current timestamp as an ISO-8601 string.

Uuid

A fresh UUIDv4 string.

Sequence(String)

The next value from a named sequence.

CustomName(String)

A user-defined default registered by name (resolved at runtime).

Trait Implementations

impl Clone for DefaultKind

fn clone(&self) -> DefaultKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DefaultKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DefaultKind

fn deserialize<__D>( __deserializer: __D, ) -> Result<DefaultKind, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for DefaultKind

fn eq(&self, other: &DefaultKind) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for DefaultKind

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for DefaultKind