Question

我必须感到厌倦，因为我真的无法弄清楚这么简单的任务。

拥有：

class Account < ActiveRecord::Base
  has_one :subscription, :dependent => :destroy

  after_save :append_subscription

  private
  def append_subscription
    # TODO
  end
end

# Subscription(id: integer, account_id: integer, level: integer (: 1), starts_at: date, ends_at:date, created_at: datetime, updated_at: datetime)

class Subscription < ActiveRecord::Base
  belongs_to :account
end

我正在尝试解决TODO部分，或者我是以错误的方式解决它？这是测试。

describe Account do
  include AccountSpecHelper

  it "should have a subscription at least at level one on creation" do
    account = Account.create
    account.subscription.level.should be(1)
  end
end

Answer 1

为什么after_save而不是before_create让ActiveRecord担心创建关联模型并正确分配account_id？

我没有检查过，但这应该有效：

class Account
  before_create {|account| account.build_subscription(params)} # or move it to method
end

在Rails中创建关联模型？

1 个答案: