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purpose?" heuristics
Narrows the "are you in a browser, viewing the page?" check to exclude
non-GET requests. Allows content-less APIs to use implicit responses
without having to set a fake request format.
This will need further attention. If you forget to redirect from a POST
to a GET, you'll get a 204 No Content response that browsers will
typically treat as… do nothing. It'll seem like the form just didn't
work and knowing where to start debugging is non-obvious.
On the flip side, redirecting from POST and others is the default, done
everywhere, so it's less likely to be removed or otherwise missed.
Alternatives are to do more explicit browser sniffing.
Ref #23827.
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When trying to make a request and the request doesn't have a suitable template, the new error messages are really helpful but there's a small (and I mean, VERY small) typo that has been bugging me for the last few days. This adds the space and restores order to the universe. :heart:
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* Fixes typos in error message and release notes.
* Removes unused template test file.
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1. Conceptually revert #20276
The feature was implemented for the `responders` gem. In the end,
they did not need that feature, and have found a better fix (see
plataformatec/responders#131).
`ImplicitRender` is the place where Rails specifies our default
policies for the case where the user did not explicitly tell us
what to render, essentially describing a set of heuristics. If
the gem (or the user) knows exactly what they want, they could
just perform the correct `render` to avoid falling through to
here, as `responders` did (the user called `respond_with`).
Reverting the patch allows us to avoid exploding the complexity
and defining “the fallback for a fallback” policies.
2. `respond_to` and templates are considered exhaustive enumerations
If the user specified a list of formats/variants in a `respond_to`
block, anything that is not explicitly included should result
in an `UnknownFormat` error (which is then caught upstream to
mean “406 Not Acceptable” by default). This is already how it
works before this commit.
Same goes for templates – if the user defined a set of templates
(usually in the file system), that set is now considered exhaustive,
which means that “missing” templates are considered `UnknownFormat`
errors (406).
3. To keep API endpoints simple, the implicit render behavior for
actions with no templates defined at all (regardless of formats,
locales, variants, etc) are defaulted to “204 No Content”. This
is a strictly narrower version of the feature landed in #19036 and
#19377.
4. To avoid confusion when interacting in the browser, these actions
will raise an `UnknownFormat` error for “interactive” requests
instead. (The precise definition of “interactive” requests might
change – the spirit here is to give helpful messages and avoid
confusions.)
Closes #20666, #23062, #23077, #23564
[Godfrey Chan, Jon Moss, Kasper Timm Hansen, Mike Clark, Matthew Draper]
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In 0de4a23 the behavior when there is a missing template was changed to
not raise an error, but instead head :no_content. This is a breaking
change and some gems rely on this happening.
To allow gems and other code to work around this, allow
`default_render` to take a block which, if provided, will
execute the contents of that block instead of doing the `head :no_content`.
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After merging #19377 ActionPack tests were missing a require for
`ActiveSupport::LogSubscriber::TestHelper` and change didn't take
into account that logger could be nil. Added the require and only log to
info if logger exists.
This wasn't caught earlier because these tests only run after a merge.
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* Check for performed? instead of response_body
* Change performed? to return a boolean
* Refactor AC::Metal#response_body= to reuse variable
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navigation
Signed-off-by: José Valim <jose.valim@gmail.com>
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Conflicts:
actionpack/lib/action_controller/metal/implicit_render.rb
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lookup.
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