ActiveSupport::RangeWithFormat
Methods
T
Constants
RANGE_FORMATS = { db: Proc.new { |start, stop| "BETWEEN '#{start.to_s(:db)}' AND '#{stop.to_s(:db)}'" } }
 
Instance Public methods
to_default_s(format = :default)
Alias for: to_s
to_formatted_s(format = :default)
Alias for: to_s
to_s(format = :default)

Convert range to a formatted string. See RANGE_FORMATS for predefined formats.

range = (1..100)           # => 1..100

range.to_s                 # => "1..100"
range.to_s(:db)            # => "BETWEEN '1' AND '100'"

Adding your own range formats to #to_s

You can add your own formats to the Range::RANGE_FORMATS hash. Use the format name as the hash key and a Proc instance.

# config/initializers/range_formats.rb
Range::RANGE_FORMATS[:short] = ->(start, stop) { "Between #{start.to_s(:db)} and #{stop.to_s(:db)}" }
Also aliased as: to_default_s, to_formatted_s

Source: show | on GitHub 

# File activesupport/lib/active_support/core_ext/range/conversions.rb, line 19
def to_s(format = :default)
  if formatter = RANGE_FORMATS[format]
    formatter.call(first, last)
  else
    super()
  end
end