Struct state_objects::UniqueIndex

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pub struct UniqueIndex<UniqueKey, PrimaryKey> { /* private fields */ }
Expand description

Enforces a queryable, uniqueness constraint on a set of fields in a map.

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impl<UniqueKey, PrimaryKey> UniqueIndex<UniqueKey, PrimaryKey>

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pub fn get( &self, ctx: &Context<'_>, key: &UniqueKey, ) -> Response<'_, Option<PrimaryKey>>

Gets the primary key for the given unique key.

Auto Trait Implementations§

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impl<UniqueKey, PrimaryKey> Freeze for UniqueIndex<UniqueKey, PrimaryKey>

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impl<UniqueKey, PrimaryKey> RefUnwindSafe for UniqueIndex<UniqueKey, PrimaryKey>
where UniqueKey: RefUnwindSafe, PrimaryKey: RefUnwindSafe,

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impl<UniqueKey, PrimaryKey> Send for UniqueIndex<UniqueKey, PrimaryKey>
where UniqueKey: Send, PrimaryKey: Send,

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impl<UniqueKey, PrimaryKey> Sync for UniqueIndex<UniqueKey, PrimaryKey>
where UniqueKey: Sync, PrimaryKey: Sync,

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impl<UniqueKey, PrimaryKey> Unpin for UniqueIndex<UniqueKey, PrimaryKey>
where UniqueKey: Unpin, PrimaryKey: Unpin,

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impl<UniqueKey, PrimaryKey> UnwindSafe for UniqueIndex<UniqueKey, PrimaryKey>
where UniqueKey: UnwindSafe, PrimaryKey: UnwindSafe,

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

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type Error = Infallible

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

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.