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RelationshipIndex

Struct RelationshipIndex 

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pub struct RelationshipIndex<'m> { /* private fields */ }
Expand description

Reverse-reference index paired with the model snapshot it indexes.

Build this once when querying many entities. It preserves the tolerant decoding of super::naming while avoiding a relationship rescan per target. Mutating the borrowed model requires dropping this index first, so its derived references cannot silently become stale.

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impl<'m> RelationshipIndex<'m>

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pub fn build(model: &'m Model) -> Self

Build one reverse index over the model snapshot.

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pub fn naming(&self, target: EntityId) -> Vec<Relationship>

Relationships whose related/member end names target.

Results use the same deterministic kind and entity ordering as super::all. Malformed or unrelated records that merely reference the target from the same absolute slot are ignored.

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impl<'m> Debug for RelationshipIndex<'m>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'m> !RefUnwindSafe for RelationshipIndex<'m>

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impl<'m> !UnwindSafe for RelationshipIndex<'m>

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impl<'m> Freeze for RelationshipIndex<'m>

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impl<'m> Send for RelationshipIndex<'m>

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impl<'m> Sync for RelationshipIndex<'m>

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impl<'m> Unpin for RelationshipIndex<'m>

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impl<'m> UnsafeUnpin for RelationshipIndex<'m>

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.