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Contents
# encoding: utf-8
module Mongoid #:nodoc:
module Contexts #:nodoc:
class Enumerable
class Sort
attr_reader :value, :direction
# Create a new sorting object. This requires a value and a sort
# direction of +:asc+ or +:desc+.
def initialize(value, direction)
@value = value
@direction = direction
end
# Return +true+ if the direction is +:asc+, otherwise false.
def ascending?
direction == :asc
end
# Compare two +Sort+ objects against each other, taking into
# consideration the direction of the sorting.
def <=>(other)
cmp = compare(value, other.value)
ascending? ? cmp : cmp * -1
end
private
# Compare two values allowing for nil values.
def compare(a, b)
case
when a.nil?
b.nil? ? 0 : 1
when b.nil?
-1
else
a <=> b
end
end
end
end
end
end
Version data entries
206 entries across 114 versions & 6 rubygems