Enum UpdateNonNullable

pub enum UpdateNonNullable<T> {
    Keep,
    Change(T),
}

Clearer representation of an optional non-nullable field.

Requires #[serde(default, skip_serializing_if = "Update::is_keep")] to be applied to fields which use this type.

Variants

Keep

Use the current value stored in the database. Equivalent of undefined in JS.

Change(T)

Use the given value.

Implementations

impl<T> UpdateNonNullable<T>

pub const fn is_keep(&self) -> bool

Whether this is the Keep variant

pub const fn is_change(&self) -> bool

Whether this is the Change variant

pub fn into_option(self) -> Option<T>

Similar to Option<Option<T>>::flatten(), this converts the variant into an Option<T>.

Useful for coalesce updates.

Trait Implementations

impl<T: Clone> Clone for UpdateNonNullable<T>

fn clone(&self) -> UpdateNonNullable<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for UpdateNonNullable<T>

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

Formats the value using the given formatter.

impl<T> Default for UpdateNonNullable<T>

fn default() -> UpdateNonNullable<T>

Returns the “default value” for a type.

impl<'de, T> Deserialize<'de> for UpdateNonNullable<T>

where T: Deserialize<'de>,

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T> From<Option<T>> for UpdateNonNullable<T>

fn from(value: Option<T>) -> Self

Converts to this type from the input type.

impl<T> Serialize for UpdateNonNullable<T>

where T: Serialize,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.