Struct ModelId 

pub struct ModelId<M>
where
    M: ?Sized,
{ /* private fields */ }

A typed, opaque id for one M row: Copy, 8 bytes, cheap to pass and compare. It wraps the key’s path handle: Store::elem, query results, list slots and destinations all speak it, and a wrong-model id is a compile error rather than a wrong row. ModelId::key recovers the real key for display, deep links, or the persistence edge.

Ordering compares handles: meaningful for integer keys, arbitrary (but stable) for wide ones; it exists so ids can live in sorted containers.

Implementations

impl<M> ModelId<M>

where M: ?Sized,

pub fn of(key: impl AsKey) -> ModelId<M>

The id for key, interning it if wide.

pub const fn from_handle(handle: u64) -> ModelId<M>

Wrap an existing path handle (from Store::keys, a slot token, a change record).

pub fn handle(self) -> u64

pub fn key(self) -> Key

The real key: identity for integer handles, the interner’s record for wide ones.

Trait Implementations

impl<M> Clone for ModelId<M>

where M: ?Sized,

fn clone(&self) -> ModelId<M>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<M> Copy for ModelId<M>

where M: ?Sized,

impl<M> Debug for ModelId<M>

where M: ?Sized,

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

Formats the value using the given formatter.

impl<M> Eq for ModelId<M>

where M: ?Sized,

impl<M> From<&Key> for ModelId<M>

where M: ?Sized,

fn from(k: &Key) -> ModelId<M>

Converts to this type from the input type.

impl<M> From<&str> for ModelId<M>

where M: ?Sized,

fn from(k: &str) -> ModelId<M>

Converts to this type from the input type.

impl<M> From<Key> for ModelId<M>

where M: ?Sized,

fn from(k: Key) -> ModelId<M>

Converts to this type from the input type.

impl<M> From<String> for ModelId<M>

where M: ?Sized,

fn from(k: String) -> ModelId<M>

Converts to this type from the input type.

impl<M> From<Uuid> for ModelId<M>

where M: ?Sized,

fn from(k: Uuid) -> ModelId<M>

Converts to this type from the input type.

impl<M> From<i32> for ModelId<M>

where M: ?Sized,

fn from(k: i32) -> ModelId<M>

Converts to this type from the input type.

impl<M> From<u32> for ModelId<M>

where M: ?Sized,

fn from(k: u32) -> ModelId<M>

Converts to this type from the input type.

impl<M> From<u64> for ModelId<M>

where M: ?Sized,

Raw path handles convert directly; this is how store.elem(k) keeps taking the values Store::keys returns, and how integer keys stay literal-friendly.

fn from(handle: u64) -> ModelId<M>

Converts to this type from the input type.

impl<M> From<usize> for ModelId<M>

where M: ?Sized,

fn from(k: usize) -> ModelId<M>

Converts to this type from the input type.

impl<M> Hash for ModelId<M>

where M: ?Sized,

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<M> Ord for ModelId<M>

where M: ?Sized,

fn cmp(&self, other: &ModelId<M>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<M> PartialEq for ModelId<M>

where M: ?Sized,

fn eq(&self, other: &ModelId<M>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<M> PartialEq<u64> for ModelId<M>

where M: ?Sized,

Integer-keyed ids compare against their key value directly: assert_eq!(ids, [1, 3]) reads the way integer-keyed code always has.

fn eq(&self, other: &u64) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<M> PartialOrd for ModelId<M>

where M: ?Sized,

fn partial_cmp(&self, other: &ModelId<M>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.