Rails serializes store data as a regular hash instead of using HWIASerializing store objects with ActiveSupport::HashWithIndifferentAccess is both a wasteful and an insecure option. Instead Rails now encodes store as a regular hash and casts it back to HWIA before accessing.
Learn about tree shaking in Webpack 5Tree shaking is a technique used by webpack to optimize the builds for production and reducing the build size by shaking off the dead code from its branches (modules).
Rails adds include_seconds option to datetime_field.Rails now allows to omit seconds part in the input field by adding the include_seconds option to datetime_field
Pending migrations now show path instead of filenameRails warns users of pending migrations now by showing the path of the migration file, instead of just the name. This is useful in multi-db applications.
Ruby adds a new core class called Data to represent simple immutable value objectsThe Data class helps define simple classes for value-alike objects that can be extended with custom methods.
Rails 7 fixes timezone awareness for tsrange and tstzrange columnsEarlier the tsrange/tstzrange column would throw a TypeError if a timezone was set in the application config. This column now stores time with the correct timezone.
Rails adds the --parent option to the job generatorSimilar to the working of the model generator, the job generator now accepts the --parent option. This allows one to generate a job that inherits from the specified parent class.
Rails adds :strict option to the default SQLite database.yml fileSQLite can be configured to be strict to circumvent some of its quirks. Rails can now specify this in the default database.yml file.
Two new properties in CSS - overflow:clip and overflow-clip-marginoverflow: clip and overflow: hidden both do the same job of hiding content that overflows. However, overflow: clip also disables programmatic scrolling. Another property overflow-clip-margin controls how far from the element's edge the clipping begins.
Rails now validates options used in migration functionsPreviously erroneous options were silently ignored in migration functions such as "create_table" or "add_column", now they raise an error.