ResourceIterator

Struct ResourceIterator 

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pub struct ResourceIterator<Q: ResourceQuery> { /* private fields */ }
Expand description

Generic iterator over resources.

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impl<Q> ResourceIterator<Q>
where Q: ResourceQuery + Send,

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pub async fn one(self) -> Result<Q::Item>

Assert that only one item is left and fetch it.

Fails with ResourceNotFound if no items are left and with TooManyItems if there is more than one item left.

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pub fn into_stream(self) -> impl Stream<Item = Result<Q::Item>>

Convert this iterator into a proper implementor of the Stream trait.

This stream yields Result<Q::Item> items and is therefore also an implementor of the TryStream trait.

Note that no requests are done until you start iterating.

Trait Implementations§

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impl<Q: Clone + ResourceQuery> Clone for ResourceIterator<Q>
where Q::Item: Clone,

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fn clone(&self) -> ResourceIterator<Q>

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<Q: Debug + ResourceQuery> Debug for ResourceIterator<Q>
where Q::Item: Debug,

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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<Q> Freeze for ResourceIterator<Q>
where Q: Freeze,

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impl<Q> RefUnwindSafe for ResourceIterator<Q>

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impl<Q> Send for ResourceIterator<Q>
where Q: Send, <Q as ResourceQuery>::Item: Send,

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impl<Q> Sync for ResourceIterator<Q>
where Q: Sync, <Q as ResourceQuery>::Item: Sync,

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impl<Q> Unpin for ResourceIterator<Q>
where Q: Unpin, <Q as ResourceQuery>::Item: Unpin,

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impl<Q> UnwindSafe for ResourceIterator<Q>

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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> PolicyExt for T
where T: ?Sized,

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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more