Struct LazyCollection 

pub struct LazyCollection<T> { /* private fields */ }

Opt-in lazy collection navigation wrapper.

This type stores loaded values and load state, but it never owns a database context and never performs I/O from accessors, formatting, cloning or comparison. Loading must happen through an explicit ORM method.

Implementations

impl<T> LazyCollection<T>

pub const fn unloaded() -> Self

Creates an unloaded lazy collection.

pub fn from_vec(values: Vec<T>) -> Self

Creates a loaded lazy collection from existing values.

pub fn is_loaded(&self) -> bool

Returns whether a load operation has populated this wrapper.

pub fn as_slice(&self) -> &[T]

Returns loaded related entities.

This is a memory-only accessor. It never executes SQL.

pub fn set_loaded(&mut self, values: Vec<T>)

Replaces the loaded values and marks this wrapper as loaded.

pub fn clear(&mut self)

Clears the cached values and marks this wrapper as unloaded.

Trait Implementations

impl<T: Clone> Clone for LazyCollection<T>

fn clone(&self) -> LazyCollection<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for LazyCollection<T>

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

Formats the value using the given formatter.

impl<T> Default for LazyCollection<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: PartialEq> PartialEq for LazyCollection<T>

fn eq(&self, other: &LazyCollection<T>) -> 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<T: Eq> Eq for LazyCollection<T>

impl<T> StructuralPartialEq for LazyCollection<T>