module Mongoid::Criteria::Translator

This is a helper module for translating atomic and composite Ruby values into corresponding query and option components. Originally implemented as patches to core classes, that approach has generally fallen into disfavor, as it bleeds too much into the public namespace.

@api private

Public Instance Methods

to_direction(value) click to toggle source

Converts the given value to a direction specification for use in sorting.

@example Convert the value to a direction.

Translator.to_direction(:desc)
Translator.to_direction("1")
Translator.to_direction(-1)
Translator.to_direction(score: { "$meta": "textScore" })

@param [ Hash | Numeric | String | Symbol ] value The value to convert.

@return [ Hash | Numeric ] The direction.

# File lib/mongoid/criteria/translator.rb, line 29
def to_direction(value)
  case value
  when Hash then
    value
  when Numeric then
    value
  when String then
    value =~ /desc/i ? -1 : 1
  when Symbol then
    to_direction(value.to_s)
  else
    raise ArgumentError, "cannot translate #{value.inspect} (#{value.class}) to a direction specification"
  end
end