Question

在rspec控制器规范中，在模型valid_attributes关联时定义has_one方法的正确方法是什么？

* Rails 3.2.12，rspec 2.12，factory_girl_rails 4.2.1 *

如果您使用两个模型创建一个新的Rails项目，Person和Brain，就像这样：

rails new crowd
cd crowd
rails g scaffold person name:string
rails g scaffold brain weight_kg:float

（并做好所有与他们联系的工作），你最终可以得到这些模型：

class Brain < ActiveRecord::Base
  belongs_to :person
  attr_accessible :weight_kg
  attr_accessible :person
  attr_accessible :person_attributes
  accepts_nested_attributes_for :person
end
class Person < ActiveRecord::Base
  has_one :brain
  attr_accessible :name
  attr_accessible :brain
  attr_accessible :brain_attributes

  accepts_nested_attributes_for :brain
  validates :brain, :presence => { :message => "Please give me a brain" }
end

spec / controllers / people_controller_spec.rb的相关自动生成内容：

describe PeopleController do
  def valid_attributes
    {
        "name" => "A Person",
    }
  end

此时，对于Person，valid_attributes无效，因为它缺少Brain。好的，我们加一个。但是如何？

错误：

  def valid_attributes
    {
        "name" => "A Person",
        "brain" => { "weight_kg" => "25" }
    }
  end

^生成ActiveRecord::AssociationTypeMismatch: Brain(#86698290) expected, got ActiveSupport::HashWithIndifferentAccess(#84831840)

错误：

  def valid_attributes
    {
        "name" => "A Person",
        "brain" => Brain.new(:weight_kg => 25)
    }
  end

^因为它不会保存。错误将是Expected response to be a <:redirect>, but was <200>和expected persisted? to return true, got false以及其他2个。

错误：（假设有效的spec / factories / brain.rb）

  def valid_attributes
    {
        "name" => "A Person",
        "brain" => FactoryGirl.build(:brain),
    }
  end

^这是错误的，因为这也不会在创建/更新上保存person记录。错误将是Expected response to be a <:redirect>, but was <200>和expected persisted? to return true, got false以及其他2个。

Answer 1

  def valid_attributes
    {
        "name" => "A Person",
        "brain_attributes" => { "weight_kg" => "25" }
    }

或

  def valid_attributes
    {
        "name" => "A Person",
        "brain_attributes" => FactoryGirl.attributes_for(:brain)
    }

rspec控制器测试中嵌套关联的正确格式是什么？

1 个答案: