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This will ensure we attempt to render an empty collection, meaning we
don't actually render anything at all. Allowing `nil` or a falsey value
through results in calling `render_partial` rather than
`render_collection`, which isn't what we want.
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An optimization was introduced in
https://github.com/rails/rails/commit/27f4ffd11a91b534fde9b484cb7c4e515ec0fe77
which tried to `#to_ary` the collection to prevent unnecessary queries
for ActiveRecord scopes/relations. If the given collection did not
respond to `#to_ary`, and empty collection was returned. That meant you
couldn't use collections built from `Enumerator` nor `Enumerable`.
With this change, `#collection_from_options` will attempt the
optimization, but fall back to passing along the given collection,
as-is.
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Where appropriate, prefer the more concise Regexp#match?,
String#include?, String#start_with?, or String#end_with?
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Using locals will cause layouts to be cached multiple times in the
template cache. This commit removes locals from consideration when
looking up the layout.
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https://github.com/rails/rails/pull/24052/files#r55083975
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When rendering a collection with a partial whose filename contains a dot, e.g.
"customer.mobile", we would set a `locals[:'customer.mobile']` variable instead
of, as in earlier versions of Rails, `locals[:customer]`.
This bug was introduced in da9038eaa5d19c77c734a044c6b35d7bfac01104.
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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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Augments the collection caching with some instrumentation that's logged.
For collections that have been cached like:
```ruby
<%= render partial: 'notifications/notification', collection: @notifications, cached: true %>
```
We'll output a line showing how many cache hits we had when rendering it:
```
Rendered collection of notifications/_notification.html.erb [0 / 100 cache hits] (3396.5ms)
```
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Having collection caching that wraps templates and automatically tries
to infer if they are cachable proved to be too much of a hassle.
We'd rather have it be something you explicitly turn on.
This removes much of the code and docs to explain the previous automatic
behavior.
This change also removes scoped cache keys and passing cache_options.
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If the collection isn't empty any? will loop through it.
Spare the loop and be more concise with what we're asking the
collection about.
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`PartialRenderer.render_collection_with/without_template` returns an array
of rendered partials. Avoid dup'ing and shifting it by indexing into
the collection instead.
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Wasn't pulling its weight for a simple yield anymore.
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Moves us closer to having access to a local template variable,
we can ask for eligibility and its virtual_path.
Currently we rely on `@template`, which we don't have available
when rendering collections without a fixed template.
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A callable cache key writes to the collection cache under a certain namespace.
Which means if we don't have scoped cache key we can just rely on the
`cache model_name do` in the templates to cache them.
Less writes, more sharing.
Add `assert_customer_cached` to better illustrate this in tests, and remove
tests which then don't communicate as much.
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`automatic_cache_eligible?´ is only called if there was no `:cache` key
to fetch in the `@options` via `cache_collection?`. So the check will
always be false.
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Written when I didn't understand the internals as well. Action View
generally just refers to `@template` when meaning a fixed template
render. So follow that implicit convention.
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We should only support a top level `cache_options`. We also don't
have to default the options to a hash as Active Support's cache
defaults that arg to nil.
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rails view directory
CVE-2016-0752
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This commit fixes the bug convering `false` to `locals[as]` when
`options[:object]` is `false` (close #22260).
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The thread_safe gem is being deprecated and all its code has been merged
into the concurrent-ruby gem. The new class, Concurrent::Map, is exactly
the same as its predecessor except for fixes to two bugs discovered
during the merge.
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Before we were changing the state of the lookup_context for the duration
of the with_layout_format block, but since we already know the formats
we can just pass it explicitly.
Related with 8d7ce0f22aee09d20091a4dc58cb379a09d13e26
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explicitely.
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Adds the `virtual_path` option to `cache_fragment_name` so it can
be provided when needed.
That allows `cache_collection_render` to get the appropriate cache
key with the digest generated based on the template and prevent
collision with other templates that cache the same collection.
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When one rendered a partial template without specifying an object
or a collection (e.g. <%= render partial: 'partial_name' %>), Rails
would make an object called :partial_name available in local_assigns.
I don't think this was the intended behavior, since no local variable
called 'partial_name' gets defined in the view.
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[ci skip] Unify the code comment in ActionView::Renderer#render_template...
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Collections can take advantage of `multi_read` if they render one template
and their partials begin with a cache call.
The cache call must correspond to either what the collections elements are
rendered as, or match the inferred name of the partial.
So with a notifications/_notification.html.erb template like:
```ruby
<% cache notification %>
<%# ... %>
<% end %>
```
A collection would be able to use `multi_read` if rendered like:
```ruby
<%= render @notifications %>
<%= render partial: 'notifications/notification', collection: @notifications, as: :notification %>
```
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Makes caching a collection of template partials faster using `read_multi`
on the Rails cache store.
Some caching implementations have optimized `read_multi` so we don't have
to check in the cache store for every template.
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because the partial renderer would not create an lvar per each template since c67005f221f102fe2caca231027d9b11cf630484
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The "Rendering" word in the titles is not meant to be a link to
the documentation for ActionView::Rendering.
[ci skip]
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before this PR IDENTIFIER_ERROR_MESSAGE could lead to misunderstand the convention of partial name.
Added OPTION_AS_ERROR_MESSAGE for unvalid charter in as option.
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Originally caused by #17771
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c67005f221f102fe2caca231027d9b11cf630484 made the local var in partials
available only if what passed to `:object` was truthy.
For example this would not make the local variable `foo` available inside the
partial:
render partial: 'foo', object: false
Fixes #17373.
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