# RL-10 未完- 新增狀態欄 state

狀態機
安全更改狀態，而非直接進db改值。
event 作到狀態改變。

安裝 aasm gem
gem install aasm
bundle install

在Model（note）作

include AASM
aasm column: 'state' do
	state :draft, initial: true
	state :public, :hidden

	event :publish do
		transitions from: :draft to: :public
	end

	event :hide do
		transitions from: :public to: :hidden
	end

	event :hide do
		transitions from: [:public, to: :hidden], to: :draft
	end

從public與hidden改為draft 改叫 recall
event :recall do
transitions from: [:public, to: :hidden], to: :draft
end

撞名
public改published

###### tags: `Rails`