Question

我想使用rails创建一个具有单个rest调用的复杂rest对象实例。在下面的示例中，当我在带有参数哈希的Person上调用new时，控制器中出现错误。

在看到ActiveSupport :: HashWithIndifferentAccess而不是PhoneNumber时，我收到意外类型的错误

从测试传递的哈希包含一个Hash对象数组，而控制器操作参数创建ActiveSupport :: HashWithIndifferentAccess对象。

有任何修复错误的建议吗？
使用单次休息调用是否有更简单的方法来创建复杂的activerecord对象。

即模型：

class Person < ActiveRecord::Base  
  has_many :phone_numbers , :autosave => true  

class PhoneNumber  < ActiveRecord::Base  
  belongs_to :person

person_controller_test.rb

test "should create person" do
  newperson=Person.new(:name => "test")
  newperson.phone_numbers << PhoneNumber.new(:number => "123-4567")
  person_string= newperson.to_xml(:include => :phone_numbers)
  person_hash=Hash.from_xml(course_string)
  person_hash2=person_hash['person']
  post :create, :person => person_hash2, :format => "xml"
  assert_response :success
end

person_controller.rb

def create  
  @person = Person.new(params[:person])

Answer 1

class Person < ActiveRecord::Base  
  has_many :phone_numbers , :autosave => true
  # this is important for create complex nested object in one call
  accepts_nested_attributes_for :phone_numbers
end

class PhoneNumber  < ActiveRecord::Base  
  belongs_to :person
end

person_controller_test.rb

test "should create person" do
  newperson=Person.new(:name => "test")
  newperson.phone_numbers.build(:number => "123-4567") #more cleaner
  # and start from here I'm not sure but this maybe help you
  # I think that you must pass a json object 
  post :create, :person => newperson.to_json(:include => :phone_numbers), :format => "xml"
  assert_response :success
end

link：http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html

Answer 2

Dinatih，谢谢你的回答！它帮助解决了这个问题。

因为“accepts_nested_attributes_for：phone_numbers”，我遇到了一个小问题，需要散列键'phone_numbers_attributes'而不是'phone_numbers'的to_xml / to_json序列化默认值。测试代码（下面）看起来有点难看，但它会正确传递并创建对象。不幸的是，将json传递给post方法也不会创建对象。

test "should create complex person" do
  newperson=Person.new(:name => "test")
  newperson.phone_numbers.build(:number => "123-4567")
  person_string= newperson.to_xml(:include => :phone_numbers)
  person_hash=Hash.from_xml(person_string)
  person_hash2=person_hash['person']
  person_hash2[:phone_numbers_attributes] = person_hash2['phone_numbers']
  person_hash2.delete('phone_numbers')
  p person_hash2
  post :create, :person => person_hash2, :format => "xml"
  p response.body
  assert_select "person" do
    assert_select "name", {:text=>"test"}
    assert_select "phone-numbers" do
      assert_select "phone-number" do
        assert_select "number", {:text=>"123-4567"}
      end
    end
  end
  assert_response :success
end

Answer 3

你也应该看看：

Gem nested_form：
- https://github.com/ryanb/nested_form
- nested_form的示例：https://github.com/ryanb/complex-form-examples/tree/nested_form

和

RailsCasts 196/197
- http://railscasts.com/episodes/196-nested-model-form-part-1
- http://railscasts.com/episodes/197-nested-model-form-part-2

在单个rest调用中创建rest复杂资源实例

3 个答案: