Method: ActiveRecord::Reflection::AssociationReflection#compute_class

Defined in:
lib/active_record/reflection.rb

#compute_class(name) ⇒ Object

:nodoc:



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# File 'lib/active_record/reflection.rb', line 490

def compute_class(name)
  if polymorphic?
    raise ArgumentError, "Polymorphic associations do not support computing the class."
  end

  begin
    klass = active_record.send(:compute_type, name)
  rescue NameError => error
    if error.name.match?(/(?:\A|::)#{name}\z/)
      message = "Missing model class #{name} for the #{active_record}##{self.name} association."
      message += " You can specify a different model class with the :class_name option." unless options[:class_name]
      raise NameError.new(message, name)
    else
      raise
    end
  end

  unless klass < ActiveRecord::Base
    raise ArgumentError, "The #{name} model class for the #{active_record}##{self.name} association is not an ActiveRecord::Base subclass."
  end

  klass
end