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Add FromRef trait #1268

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merged 5 commits into from
Aug 17, 2022
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Makes it possible to extract substates without cloning the outer state.

Part of #1155 (review)

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With this, most of the S: Clone bounds can be removed, right? (e.g. on all Router impls except impl Clone)

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With this, most of the S: Clone bounds can be removed, right? (e.g. on all Router impls except impl Clone)

Nope. We still need it for places like https://github.com/tokio-rs/axum/blob/router-state-extractor--from-ref/axum/src/routing/mod.rs#L487

@davidpdrsn davidpdrsn merged commit 96531b7 into router-state-extractor Aug 17, 2022
@davidpdrsn davidpdrsn deleted the router-state-extractor--from-ref branch August 17, 2022 14:59
davidpdrsn added a commit that referenced this pull request Aug 17, 2022
* begin threading the state through

* Pass state to extractors

* make state extractor work

* make sure nesting with different states work

* impl Service for MethodRouter<()>

* Fix some of axum-macro's tests

* Implement more traits for `State`

* Update examples to use `State`

* consistent naming of request body param

* swap type params

* Default the state param to ()

* fix docs references

* Docs and handler state refactoring

* docs clean ups

* more consistent naming

* when does MethodRouter implement Service?

* add missing docs

* use `Router`'s default state type param

* changelog

* don't use default type param for FromRequest and RequestParts

probably safer for library authors so you don't accidentally forget

* fix examples

* minor docs tweaks

* clarify how to convert handlers into services

* group methods in one impl block

* make sure merged `MethodRouter`s can access state

* fix docs link

* test merge with same state type

* Document how to access state from middleware

* Port cookie extractors to use state to extract keys (#1250)

* Updates ECOSYSTEM with a new sample project (#1252)

* Avoid unhelpful compiler suggestion (#1251)

* fix docs typo

* document how library authors should access state

* Add `RequestParts::with_state`

* fix example

* apply suggestions from review

* add relevant changes to axum-extra and axum-core changelogs

* Add `route_service_with_tsr`

* fix trybuild expectations

* make sure `SpaRouter` works with routers that have state

* Change order of type params on FromRequest and RequestParts

* reverse order of `RequestParts::with_state` args to match type params

* Add `FromRef` trait (#1268)

* Add `FromRef` trait

* Remove unnecessary type params

* format

* fix docs link

* format examples

* Avoid unnecessary `MethodRouter`

* apply suggestions from review

Co-authored-by: Dani Pardo <dani.pardo@inmensys.com>
Co-authored-by: Jonas Platte <jplatte+git@posteo.de>
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