PROSAGA码农传奇-安全检测-FactoryGirl和RSpec：创建具有规范所需的nested

我有一个模型contact是has_many :locations, through: :relationships，还有has_many :teams, through: :contacts_teams。联系人必须具有关联的team，location以便通过验证。换句话说：一个新的contact必须具有关联的relationship记录和关联的contacts_team记录。以下是模型：
<pre><code>#models/contact.rb
class Contact < ActiveRecord::Base
 has_many :contacts_teams
 has_many :teams, through: :contacts

has_many :relationships, dependent: :destroy
  has_many :locations, through: :relationships

accepts_nested_attributes_for :contacts_teams, allow_destroy: true

# upon create, validate that at least one associated team and one associated location exist
  validate :at_least_one_contacts_team
  validate :at_least_one_relationship

private

def at_least_one_contacts_team
    return errors.add :base, "Must have at least one Team" unless contacts_teams.length > 0
  end

def at_least_one_relationship
    return errors.add :base, "Must have at least one Location" unless relationships.length > 0
  end
end

#models/contacts_team.rb
class ContactsTeam < ActiveRecord::Base
 belongs_to :contact
 belongs_to :team
end

#models/team.rb
class Team < ActiveRecord::Base
 has_many :contacts_teams
 has_many :contacts, through: :contacts_teams
end

#models/relationship.rb
class Relationship < ActiveRecord::Base
 belongs_to :contact
 belongs_to :location
end

#models/location.rb
class Location < ActiveRecord::Base
 has_many :relationships
 has_many :contacts, through: :relationships
end
</code></pre>测试：使用factory_girl，我想创建一个contact能够成功创建contact记录的工厂。由于每条contact记录都需要一个关联的contacts_team记录和relationship记录：当我创建contact记录时，也应同时创建它们。同样：contacts_team记录应具有team与之关联relation的现有记录，并且记录应具有location与之关联的现有记录。因此从本质上讲，它也应该创建location和team记录。如何创建与工厂的联系记录，实际上创建了关联的contacts_team记录和relationship记录？这是我目前的工厂：
<pre><code>FactoryGirl.define do
 factory :contact do
 first_name "Homer"
 last_name "Simpson"
 title "Nuclear Saftey Inspector"
 end
end

FactoryGirl.define do
  factory :contacts_team do
  end
end

FactoryGirl.define do
  factory :team do
    name "Safety Inspection Team"
  end
end

FactoryGirl.define do
  factory :relationship do
  end
end

FactoryGirl.define do
 factory :location do
 name "Safety Location"
 end
end
</code></pre>如果很难/不可能使用factory_girl进行此操作：如何使用直接rspec进行处理？问题是我无法创建一个contacts_team记录或一条relationship记录，因为与contact它关联的记录还不存在！而且我无法创建contact记录，因为关联的contacts_team记录或relationship记录尚不存在。似乎我被困住了，但是必须有一种做到这一点的方法。

FactoryGirl和RSpec：创建具有规范所需的nested_attributes的记录