Class: NilClass

Inherits:

Object

• Object
• NilClass

show all

Defined in:

activesupport/lib/active_support/whiny_nil.rb,
activesupport/lib/active_support/json/encoding.rb,
activesupport/lib/active_support/core_ext/object/try.rb,
activesupport/lib/active_support/core_ext/object/blank.rb,
activesupport/lib/active_support/core_ext/object/to_param.rb,
activesupport/lib/active_support/core_ext/object/duplicable.rb

Overview

Constant Summary

METHOD_CLASS_MAP =

Hash.new

AS_JSON =

ActiveSupport::JSON::Variable.new('null').freeze

Class Method Summary (collapse)

• + (Object) add_whiner(klass)

Instance Method Summary (collapse)

• - (Object) as_json(options = nil)

  :nodoc:.

• - (Boolean) blank?
• - (Boolean) duplicable?
• - (Object) id

  Raises a RuntimeError when you attempt to call id on nil.

• - (Object) to_param
• - (Object) try(*args)

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# File 'activesupport/lib/active_support/whiny_nil.rb', line 44

def method_missing(method, *args, &block)
  if klass = METHOD_CLASS_MAP[method]
    raise_nil_warning_for klass, method, caller
  else
    super
  end
end

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# File 'activesupport/lib/active_support/whiny_nil.rb', line 30

def self.add_whiner(klass)
  methods = klass.public_instance_methods - public_instance_methods
  class_name = klass.name
  methods.each { |method| METHOD_CLASS_MAP[method.to_sym] = class_name }
end

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# File 'activesupport/lib/active_support/json/encoding.rb', line 168

def as_json(options = nil) AS_JSON end

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# File 'activesupport/lib/active_support/core_ext/object/blank.rb', line 41

def blank?
  true
end

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# File 'activesupport/lib/active_support/core_ext/object/duplicable.rb', line 26

def duplicable?
  false
end

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# File 'activesupport/lib/active_support/whiny_nil.rb', line 39

def id
  raise RuntimeError, "Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id", caller
end

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# File 'activesupport/lib/active_support/core_ext/object/to_param.rb', line 11

def to_param
  self
end

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# File 'activesupport/lib/active_support/core_ext/object/try.rb', line 33

def try(*args)
  nil
end