有人可以为pluginaweek - statemachine提供一个活跃的记录示例吗？

Question

有人可以举例说明如何使用pluginaweek state_machine作为具有活动记录的票证模型吗？ 我不明白文档中复杂的例子。

示例说明：

• 新的 - >接受，拒绝，反馈
• 接受 - >解决或反馈
• 反馈 - >接受或解决

Answer 1

示例票证模型（未测试）

class Ticket < ActiveRecord::Base
  attr_accessible :name, :description
  attr_accessible :state_event
  validates :name, :presence => true

  state_machine :initial => :new do

    event :accept do 
      transition [:new, :feedback] => :accepted
    end

    event :decline do
      transition :new => :declined
    end

    event :feedback do
      transition [:new, :accepted] => :feedbacked
    end

    event :solve do
      transition [:accepted, :feedback] => :solved
    end
  end
end

获取表单中所有可能的转换

<%= f.collection_select :state_event, @ticket.state_transitions, :event, :human_to_name, :include_blank => @ticket.human_state_name %>

获取票证状态： <%= ticket.state %>

获取所有可能的票证转换作为链接：

<% ticket.state_transitions.each do |transition| %>
    <%= link_to transition.event, ticket_path(ticket, ticket: {:state_event => transition.event}), :method => :put %>
<% end %>

列出要在控制器中过滤的所有可能转换

<ul>
  <li class="<%= 'active' if params[:state].blank? %>"><%= link_to 'All', tickets_path %></li>
  <% Ticket.state_machine.states.each do |state| %>
    <li class="<%= 'active' if params[:state] == state.name.to_s  %>">
      <%= link_to state.name, tickets_path(:state => state.name) %>
    </li>
  <% end %>
</ul>

class TicketsController extends ApplicationController
  ...
  def index
    @tickets = Ticket.where("state = ?", params[:state])
    ...