Struct GraphEdge 

pub struct GraphEdge { /* private fields */ }

A directed edge (relationship) in the knowledge graph.

Edges connect nodes and can have a label (type) and properties.

Example

use velesdb_core::collection::graph::GraphEdge;
use serde_json::json;
use std::collections::HashMap;

let mut props = HashMap::new();
props.insert("since".to_string(), json!("2020-01-01"));

let edge = GraphEdge::new(1, 100, 200, "KNOWS")
    .with_properties(props);

Implementations

impl GraphEdge

pub fn new(id: u64, source: u64, target: u64, label: &str) -> Result<Self>

Creates a new edge with the given ID, endpoints, and label.

Errors

Returns Error::InvalidEdgeLabel if the label is empty or whitespace-only.

pub fn with_properties(self, properties: HashMap<String, Value>) -> Self

Adds properties to this edge (builder pattern).

pub fn id(&self) -> u64

Returns the edge ID.

pub fn source(&self) -> u64

Returns the source node ID.

pub fn target(&self) -> u64

Returns the target node ID.

pub fn label(&self) -> &str

Returns the edge label (relationship type).

pub fn properties(&self) -> &HashMap<String, Value>

Returns all properties of this edge.

pub fn property(&self, name: &str) -> Option<&Value>

Returns a specific property value, if it exists.

Trait Implementations

impl Clone for GraphEdge

fn clone(&self) -> GraphEdge

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GraphEdge

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for GraphEdge

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for GraphEdge

fn eq(&self, other: &GraphEdge) -> 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 Serialize for GraphEdge

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 GraphEdge