Hi! This is Vipul bringing you the latest from this week’s changes in the Rails codebase.
Reduce memory used by ActiveSupport::Callbacks
Previously, callbacks which were shared with subclasses would not share between them the procs generated in before/after filters.
This was also lazily generated so would cause memory growth after an application is booted.
This change adds reuse of these in before/after blocks halving the memory growth from boot to post-request-serving.
Support non-column-backed attributes for enum
This re-adds support for using enum with non-column-backed attributes while still guarding against typos in enum attribute names.
When using enum with a non-column-backed attribute, the attribute must be previously declared with an explicit type.
class Post < ActiveRecord::Base
attribute :topic, :string
enum topic: %i[science tech engineering math]
Handle negative numbers in NumberToHumanSizeConverter
This Pull Request adds support for
number_to_human_size to handle negative numbers.
# => "-1234567 Bytes"
# => "-1.18 MB"
Dump schema only for a specific db for rollback/up/down tasks for multiple dbs
Before this change,
rails db:migrate:primary (and
rails db:down:primary) dumped schema files for all the databases,
even though this is not necessary.
This change fixes this before to only perform dump for specific database.
Fix casting PG money with comma as radix point
For example, when casting
"3,50" works as expected instead of raising an error.
This change adds proper support for
BroadcastLogger class, where just calling
dup wouldn’t suffice before.
Fix StrongParameters#extract_value to include blank values
This change fixes
extract_value to also work and retain blank values.
params = ActionController::Parameters.new(tags: "ruby,rails,,web")
params.extract_value(:tags) # => ["ruby", "rails", "", "web"]
This helps to fix a bug where using
url_helpers generated invalid urls if a records second composite primary key is empty.
Ignore invalid PRIMARY KEY values in ActiveRecord::Persistence.delete method
When some invalid primary key values are passed to
ActiveRecord::Persistence.delete method, Active Record still performed a
DELETE query even if it is not needed.
User Delete All (0.6ms) DELETE FROM "users" WHERE 1=0
This change now skips unnecessarily running the query.
Fix rails-ujs auto start() in bundled environments
This change fixes using
rails-ujs in bundled environments(with esbuild, etc), where
rails-ujs would not auto start properly as its
start method was getting called twice.
You can view the whole list of changes here.
We had 34 contributors to the Rails codebase this past week!
Until next time!
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