Rails now uses error_highlight to locate the columns where an error is present
With the help of Ruby 3.1's error_highlight functionality, Rails can now pinpoint the exact column where an error is present.Rails 7 adds default value support for binary columns for SQLite
Binary columns now behave like other column types with default values in SQLite.Rails 7 updates through_reflection to distribute transactions across database connections
Models that use multiple databases now perform writes within a single transaction.
ActiveRecord::QueryMethods#select adds support for hash values in Rails 7.1
ActiveRecord::QueryMethods#select adds support for hash values in Rails 7.1Rails extends routes searching to include dynamic URL params
Now search for `cats/10/toys/15` instead of `cats/:cat_id/toys/:id`, making it easier to find the route you're looking for.
Understanding the CSS parent selector :has()
If we want to target the parent element based on the content or the child elements we can use :has().
Rails "ActionController::Parameters.to_h" can now receive a block
ActionController::Parameters.to_h will now receive a block just like Hash#to_h and achieve parity. This gives the ability to customize the way parameters are passed to the controller.Rails 7 now reads ENV["SCHEMA_FORMAT"] when doing rails db:schema:{dump,load}
Previously rails db:schema:{dump,load} would only dump Ruby format. Now it reads ENV["SCHEMA_FORMAT"] to choose between Ruby and SQL formats.
Understanding CSS Feature Queries
CSS Feature Queries are a relatively new addition to the CSS specification, and provide a powerful tool for detecting support for various CSS features in the user's browser.ActiveRecord methods touch and update_columns no longer work for readonly models
Readonly models get updated when touch or update_columns is called.