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Exception: NameError

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::Exception
Instance Chain:
self, ::Exception
Inherits: Exception
Defined in: activesupport/lib/active_support/core_ext/name_error.rb

Instance Method Summary

::Exception - Inherited

#as_json

Instance Method Details

#missing_name

Extract the name of the missing constant from the exception message.

begin
  HelloWorld
rescue NameError => e
  e.missing_name
end
# => "HelloWorld"
[ GitHub ] 

  


# File 'activesupport/lib/active_support/core_ext/name_error.rb', line 12



def missing_name
  # Since ruby v2.3.0 `did_you_mean` gem is loaded by default.
  # It extends NameError#message with spell corrections which are SLOW.
  # We should use original_message message instead.
  message = respond_to?(:original_message) ? original_message : self.message

  if /undefined local variable or method/ !~ message
    $1 if /((::)?([A-Z]\w*)(::[A-Z]\w*)*)$/ =~ message
  end
end


  








  

    #missing_name?(name)  ⇒ Boolean 
  



  

    

Was this exception raised because the given name was missing?



begin
  HelloWorld
rescue NameError => e
  e.missing_name?("HelloWorld")
end
# => true


  





  


  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/core_ext/name_error.rb', line 31



def missing_name?(name)
  if name.is_a? Symbol
    self.name == name
  else
    missing_name == name.to_s
  end
end