Enum EntityKind 

pub enum EntityKind {
    Node,
    Relationship,
    Path,
    NodeList,
    RelationshipList,
    PathList,
}

What a result column holds when it is a bare graph variable (RETURN n, RETURN r, RETURN p) or a list of them (collect(n), [a, b], p.nodes, p.relationships). Any other column (a property, an expression, any other aggregate, a value alias) has no kind.

The column’s values are rendered as every surface has always seen them — a node as its key string, a relationship as a {type, start, end} map, a path as a {nodes, relationships, length} map — so a caller that ignores the kind reads exactly what it read before. A protocol that has graph structures of its own (Bolt) reads the kind, and the Entity details when they were asked for (see crate::cypher::with_entity_detail).

Variants

Node

Relationship

Path

NodeList

A list of nodes, each rendered as its key.

RelationshipList

A list of relationships, each rendered as its map.

PathList

A list of paths, each rendered as its map.

Implementations

impl EntityKind

pub fn list_of(self) -> Option<EntityKind>

The kind of a list of elements of this kind; None for a list of lists, which has no kind.

pub fn element(self) -> Option<EntityKind>

The kind of one element, for a list kind.

Trait Implementations

impl Clone for EntityKind

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EntityKind

impl Debug for EntityKind

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

Formats the value using the given formatter.

impl Eq for EntityKind

impl PartialEq for EntityKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for EntityKind