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Contents
module SoberSwag
module Serializer
##
# Given something that serializes a type 'A',
# this can be used to make a serializer of type 'A | nil'.
#
# Or, put another way, makes serializers not crash on nil values.
# If {#serialize} is passed nil, it will return `nil` immediately, and not
# try to call the serializer of {#inner}.
class Optional < Base
##
# An error thrown when trying to nest optional serializers.
class NestedOptionalError < Error; end
##
# @param inner [SoberSwag::Serializer::Base] the serializer to use for non-nil values
def initialize(inner)
@inner = inner
end
##
# @return [SoberSwag::Serializer::Base] the serializer to use for non-nil values.
attr_reader :inner
def lazy_type?
@inner.lazy_type?
end
def lazy_type
@inner.lazy_type.optional
end
def finalize_lazy_type!
@inner.finalize_lazy_type!
end
##
# If `object` is nil, return `nil`.
# Otherwise, call `inner.serialize(object, options)`.
def serialize(object, options = {})
if object.nil?
object
else
inner.serialize(object, options)
end
end
def type
inner.type.optional
end
##
# Since nesting optional types is bad, this will always raise an ArgumentError
#
# @raise [NestedOptionalError] always
# @return [void] nothing, always raises.
def optional(*)
raise NestedOptionalError, 'no nesting optionals please'
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems