Enum MutationAssignment 

pub enum MutationAssignment {
    Set(MutationExpression),
    Unset,
    Unknown,
}

Field assignment that preserves null versus removal versus unknown.

Variants

Set(MutationExpression)

Evaluate and assign a concrete value (including explicit null).

Unset

Explicitly remove the field when the model supports unset.

Unknown

Field is omitted / unknown in a partial patch input.

Implementations

impl MutationAssignment

pub fn set(expression: MutationExpression) -> Self

Construct a set assignment.

pub fn unset() -> Self

Construct an explicit unset assignment.

pub fn unknown() -> Self

Construct an unknown/omitted assignment.

pub fn rewrite_with( &self, bind_input_path: &dyn Fn(&[String], &ProjectionValueType) -> Result<ProjectionExpression, MutationProgramError>, ) -> Result<Option<ProjectionAssignment>, MutationProgramError>

Rewrite into a projection assignment. Unknown becomes omitted (caller filters).

Errors

Propagates rewrite failures from nested expressions.

Trait Implementations

impl Clone for MutationAssignment

fn clone(&self) -> MutationAssignment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MutationAssignment

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

Formats the value using the given formatter.

impl Eq for MutationAssignment

impl PartialEq for MutationAssignment

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for MutationAssignment

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MutationAssignment