Class: NilClass

Inherits:
Object show all
Defined in:
lib/active_support/whiny_nil.rb,
lib/active_support/core_ext/blank.rb,
lib/active_support/core_ext/duplicable.rb,
lib/active_support/json/encoders/nil_class.rb

Overview

:nodoc:

Constant Summary collapse

WHINERS = 
[::Array]
METHOD_CLASS_MAP = 
Hash.new

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object (private) 



45
46
47
 
# File 'lib/active_support/whiny_nil.rb', line 45

def method_missing(method, *args, &block)
  raise_nil_warning_for METHOD_CLASS_MAP[method], method, caller
end

Instance Method Details

#blank? ⇒ Boolean

Returns:

  • (Boolean) 


23
24
25
 
# File 'lib/active_support/core_ext/blank.rb', line 23

def blank?
  true
end

#duplicable? ⇒ Boolean

Returns:

  • (Boolean) 


10
11
12
 
# File 'lib/active_support/core_ext/duplicable.rb', line 10

def duplicable?
  false
end

#id ⇒ Object

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

Raises:

  • (RuntimeError) 


40
41
42
 
# File 'lib/active_support/whiny_nil.rb', line 40

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

#to_json(options = nil) ⇒ Object

:nodoc:



2
3
4
 
# File 'lib/active_support/json/encoders/nil_class.rb', line 2

def to_json(options = nil) #:nodoc:
  'null'
end