class Guaranteed::NullObject
An implementation the Null Object pattern.
Overrides some common Ruby and Rails methods to avoid continual
type-checking. Delegates most of them to an intance of NilClass.
Public Instance Methods
!()
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# File lib/guaranteed/null_object.rb, line 33 def ! true end
as_json(options = nil)
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# File lib/guaranteed/null_object.rb, line 37 def as_json(options = nil) nil end
blank?()
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# File lib/guaranteed/null_object.rb, line 25 def blank? true end
empty?()
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# File lib/guaranteed/null_object.rb, line 21 def empty? true end
method_missing(method_name, *args, &block)
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Allows instances of the class to respond to any received message.
Supports unlimited method chaining. Avoids NoMethodError in any
part of the method chain.
# File lib/guaranteed/null_object.rb, line 49 def method_missing(method_name, *args, &block) self end
persisted?()
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# File lib/guaranteed/null_object.rb, line 13 def persisted? false end
present?()
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# File lib/guaranteed/null_object.rb, line 17 def present? false end
respond_to_missing?(method_name, include_private = false)
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# File lib/guaranteed/null_object.rb, line 53 def respond_to_missing?(method_name, include_private = false) true end
tap()
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# File lib/guaranteed/null_object.rb, line 29 def tap self end
to_json()
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# File lib/guaranteed/null_object.rb, line 41 def to_json "null" end
Private Instance Methods
value()
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# File lib/guaranteed/null_object.rb, line 59 def value nil end