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.Rails 7 now accepts "html" and "screenshot" kwargs for system test screenshot helper
Pass in parameters to take_screenshot to choose an output format between image and HTML file.
Rails adds beginless range support to clusivity
Rails now adds support to include the beginless range in active record inclusivity/exclusivity validators.