Rails 4.1枚举:enum.status = nil

Question

我尝试了rails 4.1的新枚举功能并且遇到了一些麻烦.

我的模型看起来像这样:

class Report < ActiveRecord::Base
  after_save :notify_clients
  before_update :update_progress
  before_create do
    self.status ||= 'started'
  end

  enum status: %w{started active fail success}

  #...
end

如果我尝试在我看来这样使用它:

.item{class: @report.status, data: {id: @report.id}}

我会在浏览器中看到这个

<div class="item" data-id="25">

我试图找出status实际使用的内容rails console:

  [11] pry(main)> Report.all.sample.status
    Report Load (0.3ms)  SELECT `reports`.* FROM `reports`
  => nil
  [12] pry(main)> Report.all.sample.status
    Report Load (0.2ms)  SELECT `reports`.* FROM `reports`
  => nil
  [13] pry(main)> Report.all.sample.status
    Report Load (0.3ms)  SELECT `reports`.* FROM `reports`
  => nil
  [14] pry(main)> Report.all.sample.status
    Report Load (0.2ms)  SELECT `reports`.* FROM `reports`
  => nil

现在看看这个:

 [22] pry(main)> Report.all.sample.attributes['status']
    Report Load (0.2ms)  SELECT `reports`.* FROM `reports`
  => "3"

我不明白......

Answer 1

我有同样的问题.之所以这是因为枚举字段在我的模式中定义为字符串而不是整数.在您的情况下,status可能在您的架构中定义为字符串.

class CreateReport < ActiveRecord::Migration
  def change
    create_table :reports do |t|
      ...
      t.integer :status     # if this is t.string you get the symptoms described above!
      ...
    end
  end
end