Struct Relation 

pub struct Relation {
    pub id: RelationId,
    pub src_id: EntityId,
    pub dst_id: EntityId,
    pub predicate: String,
    pub attrs: Value,
    pub valid_from: Option<DateTime<Utc>>,
    pub valid_to: Option<DateTime<Utc>>,
    pub created_at: DateTime<Utc>,
}

An edge in the knowledge graph.

Fields

id: RelationId

Stable id.

src_id: EntityId

Source entity.

dst_id: EntityId

Destination entity.

predicate: String

Free-form predicate ("works_on", "depends_on", "ports_patterns_from").

attrs: Value

Arbitrary structured attributes serialised as JSON.

valid_from: Option<DateTime<Utc>>

Lower bound of validity.

valid_to: Option<DateTime<Utc>>

Upper bound of validity.

created_at: DateTime<Utc>

Wall-clock creation time.

Implementations

impl Relation

pub fn new( src_id: EntityId, dst_id: EntityId, predicate: impl Into<String>, ) -> Self

Build a new relation with no validity bounds.

Trait Implementations

impl Clone for Relation

fn clone(&self) -> Relation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Relation

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Relation

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Relation

fn eq(&self, other: &Relation) -> 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 Relation

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 Relation