Module: WriteOnce::HasWriteOnceAttributes

Defined in:
lib/write_once.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#_write_attribute(attr_name, value) ⇒ Object 



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# File 'lib/write_once.rb', line 80

def _write_attribute(attr_name, value)
  if !new_record? && attr_is_write_only?(attr_name) && !valid_change?(attr_name, value)
    handle_error(attr_name, value)
  end

  super
end

#attr_is_write_only?(attr_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/write_once.rb', line 68

def attr_is_write_only?(attr_name)
  self.class.write_once_attribute?(attr_name.to_s)
end

#handle_error(attr_name, value) ⇒ Object 



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# File 'lib/write_once.rb', line 88

def handle_error(attr_name, value)
  if WriteOnce.config.enforce_errors
    raise WriteOnceAttributeError, attr_name
  else
    WriteOnce.config.logger.warn(
      message: "Write once attribute #{attr_name} changed",
      old_value: send(attr_name),
      new_value: value,
    )
  end
end

#valid_change?(attr_name, new_value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/write_once.rb', line 63

def valid_change?(attr_name, new_value)
  current_value = send(attr_name)
  current_value.nil? || current_value == new_value
end

#write_attribute(attr_name, value) ⇒ Object 



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# File 'lib/write_once.rb', line 72

def write_attribute(attr_name, value)
  if !new_record? && attr_is_write_only?(attr_name) && !valid_change?(attr_name, value)
    handle_error(attr_name, value)
  end

  super
end