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The regular expression which was used to detect partial templates that
begin with a `<% cache ... do %>` call missed some cases. This commits
attempts to improve the detection for some cases such as multi-line
comments at the beginning of the template. The different templates are
listed in two new unit test methods.
Note that specially crafted Ruby code can still evade such `cache`-call
detection: for example, a user might have its own method which itself
calls the Rails `cache` helper. In such a case, the template's code
doesn't start with a literal `cache` string and therefore will not be
eligible for collection caching.
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Just saw these in passing while reading this file.
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Colons are not metacharacters.
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JackDanger/danger/use-default-view-pattern-in-docs
[docs] Using the real resolver pattern in docs
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If someone copies the docs into their app they'll find it simply doesn't
work because the locale pattern doesn't have the same logic. This makes
the doc examples work exactly as written.
[ci skip]
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https://github.com/ruby/ruby/pull/579 - there is a new optimization
since ruby 2.2
Previously regexp patterns were faster (since a string was converted to
regexp underneath anyway). But now string patterns are faster and
better reflect the purpose.
Benchmark.ips do |bm|
bm.report('regexp') { 'this is ::a random string'.gsub(/::/, '/') }
bm.report('string') { 'this is ::a random string'.gsub('::', '/') }
bm.compare!
end
# string: 753724.4 i/s
# regexp: 501443.1 i/s - 1.50x slower
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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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Now that we only support Ruby 2.2+ we don't need this conditional
anymore
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These requires were added only to change deprecation message
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Files without a template handler in their extension will be rended
using the raw handler instead of ERB.
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I grepped the source code for code snippets wrapped in backticks in the comments
and replaced the backticks with plus signs so they are correctly displayed in
the Rails documentation.
[ci skip]
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Now ActionView accepts <%= foo(){ %> and <%= foo()do %> :golf:
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The current style for warning messages without newlines uses
concatenation of string literals with manual trailing spaces
where needed.
Heredocs have better readability, and with `squish` we can still
produce a single line.
This is a similar use case to the one that motivated defining
`strip_heredoc`, heredocs are super clean.
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This is much less common than string literal appends, so add a special
case method for it. Maybe fixes bug reported by @jeremy on 97ef636191933f1d4abc92fc10871e6d1195285c
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I didn't want to do this, FNM_EXTGLOB is defined on 2.1.x, but Dir.glob
returns the wrong value on Ruby less than 2.2.0. Checking for a
case-insensitive FS seems too hard, so just check Ruby version Checking
for a case-insensitive FS seems too hard, so just check Ruby version.
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this is due to:
https://bugs.ruby-lang.org/issues/5994
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Before we were calling to_sym in the mime type, even when it is unknown
what can cause denial of service since symbols are not removed by the
garbage collector.
Fixes: CVE-2014-0082
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This is an option for to HTML content with a content type of
`text/html`. This rendering option calls `ERB::Util.html_escape`
internally to escape unsafe HTML string, so you will have to mark your
string as html safe if you have any HTML tag in it.
Please see #12374 for more detail.
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By default, variants in the templates will be picked up if a variant is set
and there's a match. The format will be:
app/views/projects/show.html.erb
app/views/projects/show.html+tablet.erb
app/views/projects/show.html+phone.erb
If request.variant = :tablet is set, we'll automatically be rendering the
html+tablet template.
In the controller, we can also tailer to the variants with this syntax:
class ProjectsController < ActionController::Base
def show
respond_to do |format|
format.html do |html|
@stars = @project.stars
html.tablet { @notifications = @project.notifications }
html.phone { @chat_heads = @project.chat_heads }
end
format.js
format.atom
end
end
end
The variant itself is nil by default, but can be set in before filters, like
so:
class ApplicationController < ActionController::Base
before_action do
if request.user_agent =~ /iPad/
request.variant = :tablet
end
end
end
This is modeled loosely on custom mime types, but it's specifically not
intended to be used together. If you're going to make a custom mime type,
you don't need a variant. Variants are for variations on a single mime
types.
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Missing partial folder/_partial instead of folder/partial.
Closes #13002.
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