Module: ActiveSupport::RangeWithFormat

Included in:
Range
Defined in:
activesupport/lib/active_support/core_ext/range/conversions.rb

Constant Summary collapse

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

Instance Method Summary collapse

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'"

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

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# File 'activesupport/lib/active_support/core_ext/range/conversions.rb', line 30

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