pub struct ReadTransaction<D: AsyncDatabase, S: AsyncSpawner, H> { /* private fields */ }
Expand description

ReadTransaction is a read-only transaction.

It is created by calling TransactionDB::read.

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impl<D, S, H> ReadTransaction<D, S, H>

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pub async fn get<'a: 'b, 'b>( &'a self, key: &'b D::Key ) -> Result<Option<Either<D::ItemRef<'a>, D::Item>>, D::Error>

Looks for key and returns corresponding Item.

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pub async fn iter(&self, opts: IteratorOptions) -> D::Iterator<'_>

Returns an iterator.

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pub async fn keys(&self, opts: KeysOptions) -> D::Keys<'_>

Returns an iterator over keys.

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impl<D, S, H> Drop for ReadTransaction<D, S, H>

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fn drop(&mut self)

Executes the destructor for this type. Read more

Auto Trait Implementations§

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impl<D, S, H> Freeze for ReadTransaction<D, S, H>

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impl<D, S, H> !RefUnwindSafe for ReadTransaction<D, S, H>

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impl<D, S, H> Send for ReadTransaction<D, S, H>
where H: Sync + Send,

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impl<D, S, H> Sync for ReadTransaction<D, S, H>
where H: Sync + Send,

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impl<D, S, H> Unpin for ReadTransaction<D, S, H>

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impl<D, S, H> !UnwindSafe for ReadTransaction<D, S, H>

Blanket Implementations§

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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.