Module: ActiveSupport::RangeWithFormat

Included in:

Range

Defined in:

activesupport/lib/active_support/core_ext/range/conversions.rb

Overview

Range With Format

Constant Summary

RANGE_FORMATS =

{
  db: -> (start, stop) do
    if start && stop
      case start
      when String then "BETWEEN '#{start}' AND '#{stop}'"
      else
        "BETWEEN '#{start.to_fs(:db)}' AND '#{stop.to_fs(:db)}'"
      end
    elsif start
      case start
      when String then ">= '#{start}'"
      else
        ">= '#{start.to_fs(:db)}'"
      end
    elsif stop
      case stop
      when String then "<= '#{stop}'"
      else
        "<= '#{stop.to_fs(:db)}'"
      end
    end
  end
}

Instance Method Summary

• #to_fs(format = :default) ⇒ Object (also: #to_formatted_s)

  Convert range to a formatted string.

Instance Method Details

#to_fs(format = :default) ⇒ Object Also known as: to_formatted_s

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

This method is aliased to to_formatted_s.

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

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

range = (1..)              # => 1..
range.to_fs(:db)           # => ">= '1'"

range = (..100)            # => ..100
range.to_fs(:db)           # => "<= '100'"

Adding your own range formats to to_fs

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_fs(:db)} and #{stop.to_fs(:db)}" }

# File 'activesupport/lib/active_support/core_ext/range/conversions.rb', line 51

def to_fs(format = :default)
  if formatter = RANGE_FORMATS[format]
    formatter.call(self.begin, self.end)
  else
    to_s
  end
end