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Versions: 14
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Contents
module Arel
module Nodes
class Case < Arel::Nodes::Node
include Arel::OrderPredications
include Arel::Predications
include Arel::AliasPredication
attr_accessor :case, :conditions, :default
def initialize expression = nil, default = nil
@case = expression
@conditions = []
@default = default
end
def when condition, expression = nil
@conditions << When.new(Nodes.build_quoted(condition), expression)
self
end
def then expression
@conditions.last.right = Nodes.build_quoted(expression)
self
end
def else expression
@default = Else.new Nodes.build_quoted(expression)
self
end
def initialize_copy other
super
@case = @case.clone if @case
@conditions = @conditions.map { |x| x.clone }
@default = @default.clone if @default
end
def hash
[@case, @conditions, @default].hash
end
def eql? other
self.class == other.class &&
self.case == other.case &&
self.conditions == other.conditions &&
self.default == other.default
end
alias :== :eql?
end
class When < Binary # :nodoc:
end
class Else < Unary # :nodoc:
end
end
end
Version data entries
14 entries across 14 versions & 4 rubygems