Struct UpdateOp 

pub struct UpdateOp { /* private fields */ }

Patch an existing entity, note, or edge’s mutable fields, carrying a stage-time preimage scoped to exactly the fields the patch touches. preimage’s populated fields must equal patch’s touched fields — every field the patch sets or explicitly clears to null, and no field the patch leaves unchanged — enforced at deserialize time, the same discipline DeleteOp and MergeOp apply to their own preimages below. An UpdateOp whose preimage and patch disagree on which fields changed is unrepresentable — both the checked constructor and Deserialize enforce the same congruence validation, so there is no construction path that bypasses it.

Implementations

impl UpdateOp

pub fn new( target_id: Id128, patch: UpdatePatch, preimage: UpdatePreimage, ) -> Result<Self, String>

Construct an UpdateOp, enforcing the congruence invariant: preimage must target the same substrate as patch and populate exactly the fields patch touches. This is the same invariant the Deserialize impl enforces on the wire, so an incongruent update cannot be built through either entry point.

pub fn target_id(&self) -> Id128

The identifier of the record this update targets.

pub fn patch(&self) -> &UpdatePatch

The staged patch.

pub fn preimage(&self) -> &UpdatePreimage

The field-scoped prior value the patch touches.

Trait Implementations

impl Clone for UpdateOp

fn clone(&self) -> UpdateOp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UpdateOp

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for UpdateOp

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

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for UpdateOp

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for UpdateOp

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 UpdateOp