Question

一切都按预期工作，直到我升级到Rails 3.2.11。

这就是我的模型的设置方式：

class Student < ActiveRecord::Base
    has_many :institutes
    has_many :teachers, :through => :institutes
end

class Teacher < ActiveRecord::Base
    has_many :institutes
    has_many :students, :through => :institutes
end

class Institute < ActiveRecord::Base
    belongs_to :teachers
    belongs_to :students
    validates :teacher_id, :presence => true
    validates :student_id, :uniqueness => {:scope  => :teacher_id}, :presence => true
end

我的factories.rb文件如下所示：

factory :student do
    first_name "abc"
    last_name "xyz"
    teachers {|t| [t.association(:teacher)] }
end

factory :teacher do
    first_name "ABC"
    last_name "XYZ"
end

factory :institute do
    association :student
    association :teacher
end

问题：

当我这样做时：

FactoryGirl.create(:student)

它给了我以下错误：

ActiveRecord::RecordInvalid: Validation failed: Institutes is invalid

似乎，它会创建:teacher，然后是:institute，最后是:student。因此，它在创建student_id时没有:institute，使其无效。

奇怪的是，相同的模型和factory_girl设置在Rails 3.2.8中运行良好。

我该如何解决这个问题？

Answer 1

这样的事情

factory :student do |student|  
  ...
  student.after_create do |student|  
    student.teachers << :teacher  
  end  
end

Answer 2

尝试：

factory :student do
    first_name "abc"
    last_name "xyz"
end

factory :teacher do
    first_name "ABC"
    last_name "XYZ"
end

factory :institute do
    student
    teacher
end

然后：

@institute = FactoryGirl.create(:institute)
@student = @institute.student

这适用于验证。

FactoryGirl has_many：通过在Rails 3.2.11中打破的关系

问题：

2 个答案: