Rails 7 remove_columns will now trigger a single SQL statement to remove all columns if the database supports it, instead of querying multiple SQL statements for removing individual columns.
Pass `:unlimited` symbol to `attempts` parameter of ActiveJob's `retry_on` method, which allows a developer to specify that a job should retry forever until it succeeds.
Rails 7 now harmonizes results of ActiveRecord::Calculations.average by applying column-based typecasting. Now, floating-point number columns will be aggregated as Float.
Rails 7 adds the ability to track if an association has been pointed to a new target record in the previous save and whether it will point to a new target record in the next save.
