method
define_write_method
define_write_method(attr_name)
private
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# File activerecord/lib/active_record/attribute_methods.rb, line 185 def define_write_method(attr_name) evaluate_attribute_method attr_name, "def #{attr_name}=(new_value);write_attribute('#{attr_name}', new_value);end", "#{attr_name}=" end


