method 
 missing_attribute
 
  v7.1.3.2 - Show latest stable - 0 notes - Class: ActiveModel::AttributeMethods   
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missing_attribute(attr_name, stack) private  Hide source   
 # File activemodel/lib/active_model/attribute_methods.rb, line 531 def missing_attribute(attr_name, stack) raise ActiveModel::MissingAttributeError, "missing attribute '#{attr_name}' for #{self.class}", stack end

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 = protected 