Using a Range in a Numericality Validation

Rails 7.0 allows a more compact way to specify allowed values in a numericality validation.

Instead of using combinations of greater_than, greater_than_or_equal_to, less_than, and less_than_or_equal_to, you can use in with a range.

Before

  validates :setting_reuse, numericality: { greater_than_or_equal_to: 0, less_than_or_equal_to: 12 }

After

  validates :setting_reuse, numericality: { in: 0..12 }

You get all the expressiveness that a range provides. Here are more examples each showing before and after:

  validates :setting_reuse, numericality: { greater_than_or_equal_to: 2 }
  validates :setting_reuse, numericality: { in: 2... }

  validates :setting_reuse, numericality: { less_than: 12 }
  validates :setting_reuse, numericality: { in: ...12 }

Written on June 19, 2024 by alistairmckinnell