Struct PropertyConstraintSpec 

pub struct PropertyConstraintSpec {
    pub name: String,
    pub scope: ConstraintScope,
    pub properties: Vec<String>,
    pub kind: PropertyConstraintKind,
}

Declarative spec for a property constraint. Unlike PropertyIndexSpec, constraints carry a user-facing name — DROP CONSTRAINT takes a name, not a (scope, properties, kind) tuple, so the registry keys on name for lookup. When the user omits the name, StorageEngine::create_property_constraint fills in a deterministic one derived from the other fields.

properties is a list so that PropertyConstraintKind::NodeKey can carry its composite tuple here alongside single-property kinds; the single-property kinds (Unique, NotNull, PropertyType) enforce a length-one invariant at creation time.

Fields

name: String

scope: ConstraintScope

properties: Vec<String>

kind: PropertyConstraintKind

Implementations

impl PropertyConstraintSpec

pub fn primary_property(&self) -> &str

The constraint’s first (and for single-property kinds, only) property name. Handy shorthand for call sites that already know the spec is single-property.

Trait Implementations

impl Clone for PropertyConstraintSpec

fn clone(&self) -> PropertyConstraintSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PropertyConstraintSpec

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

Formats the value using the given formatter.

impl Hash for PropertyConstraintSpec

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for PropertyConstraintSpec

fn eq(&self, other: &PropertyConstraintSpec) -> 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 Eq for PropertyConstraintSpec

impl StructuralPartialEq for PropertyConstraintSpec