Struct RelationHandle 

pub struct RelationHandle<'a, T> { /* private fields */ }

A borrowed view of a relation in the runtime identity graph.

value() is present for both Loaded and loaded-empty collection values. It is absent for a null to-one relation and for NotLoaded.

Implementations

impl<'a, T> RelationHandle<'a, T>

pub fn state(&self) -> LoadedRelation

pub fn value(&self) -> Option<&'a T>

pub fn is_loaded(&self) -> bool

pub fn is_empty(&self) -> bool

Trait Implementations

impl<'a, T: Clone> Clone for RelationHandle<'a, T>

fn clone(&self) -> RelationHandle<'a, T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, T: Copy> Copy for RelationHandle<'a, T>

impl<'a, T: Debug> Debug for RelationHandle<'a, T>

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

Formats the value using the given formatter.