Rails
Rails 6.1 adds support for check constraints to database migrations
With Rails adding support for check constraints to database migrations, check constraints can easily now be added and removed from tables with simple migration DSL. Earlier, the only way to add check constraints to tables was through raw SQL queries.
Rails 6.1 adds support for role switching and sharding in database
Rails 6.1 has added support for switching connections for one database instead of all databases
Rails 6.1 adds support for destroying dependent associations in the background
Destroying multiple layered hierarchy of associated objects can be time consuming and might result in a server timeout error. With Rails adding support for dependent associations to be deleted in the background, this issue is addressed.Rails 6.1 allows attribute's default to be configured but keeping its type
With Rails 6.1, we can set attribute's default value by keeping the type sameRails deprecates `db:structure:load` and `db:structure:dump` tasks
Running `db:structure:load` and `db:structure:dump` tasks will run `db:schema:{load/dump}` based on the value of `config.active_record.schema_format`, and they will be removed in Rails 6.2.Rails allows a module with extend ActiveSupport::Concern to be prepended
This blog post discusses the concept of prepending in Ruby and prepending concerns with the help of Active Support in Rails.Rails adds support for adding a default value to the rich text area
Rails has added support for adding a default value to the form field of type rich text area.Changes to behavior in rails db:migrate:name command
Rails has made changes to dump the schema(or structure) of the database when executing the command rails db:migrate:name. The command will also reset the `ActiveRecord::Base` connection after its execution.Rails adds a minimal flag to generate a new application
Rails used to come with a lot of frameworks by default, when we generate a new application. Now Rails introduced minimal flag to generate an application with only bare minimum frameworksRails 6.1.0.alpha allows relations with different SQL comments and Optimizer hints in "or"
ArgumentError used to be thrown when relations with SQL comments and Optimizer hints were combined using or. Rails edge(6.1.0.alpha) fixes that issue.