Ruby Datamapper通过表单更新枚举值

我有一个这样的模型：

class Project
    include DataMapper::Resource
    property    :id, Serial
    property  :title, String
    property    :slug,  String
    property    :status, Enum[:open, :closed ], :default => :open
    has n, :issues
end

我已创建一个视图来更新项目状态：

<form action="/project/update" method="post" id="project">
        <label for="status">Status
            <select id="status">
                <option value="0" 
                <% if(@project.status == :open) %>
                    selected="selected"
                <% end %>
                >Open</option>
                <option value="1"
                <% if(@project.status == :closed) %>
                    selected="selected"
                <% end %>
                >Closed</option>
            </select>
        </label>
    </form>

表单需要传递给路由哪些值来更新状态？在这种情况下，路线应该是什么样子

谢谢，“打开”和“关闭”-它们将自动转换为符号

    post '/project/update' do
            @project = Project.get(params[:project_id])
            @project.update(:title => params[:title])
    end