让工厂中的两个关联共享另一个关联
让工厂中的两个关联共享另一个关联
提问于 2012-01-11 21:31:31
我有这5个模型:卫报，学生，关系，RelationshipType和学校。在他们之间，我有这些联想
class Guardian < ActiveRecord::Base
belongs_to :school
has_many :relationships, :dependent => :destroy
has_many :students, :through => :relationships
end
class Student < ActiveRecord::Base
belongs_to :school
has_many :relationships, :dependent => :destroy
has_many :guardians, :through => :relationships
end
class Relationship < ActiveRecord::Base
belongs_to :student
belongs_to :guardian
belongs_to :relationship_type
end
class School < ActiveRecord::Base
has_many :guardians, :dependent => :destroy
has_many :students, :dependent => :destroy
end
class RelationshipType < ActiveRecord::Base
has_many :relationships
end我想写一个定义关系的FactoryGirl。每段关系都必须有一个监护人和一个学生。这两个肯定是同一所学校的。卫报工厂与学校有联系，学生工厂也是如此。我一直无法让它们在同一所学校里建造。我得到了以下代码：
FactoryGirl.define do
factory :relationship do
association :guardian
association :student, :school => self.guardian.school
relationship_type RelationshipType.first
end
end当我尝试使用此工厂构建关系时，这会导致以下错误：
undefined method `school' for #<FactoryGirl::Declaration::Implicit:0x0000010098af98> (NoMethodError)有没有办法做到我想要的，让监护人和学生属于同一所学校，而不必求助于已经创建的监护人和学生到工厂(这不是它的目的)？
回答 6
Stack Overflow用户
回答已采纳
发布于 2012-01-15 02:43:29
我认为这应该行得通：
FactoryGirl.define do
factory :relationship do
association :guardian
relationship_type RelationshipType.first
after_build do |relationship|
relationship.student = Factory(:student, :school => relationship.guardian.school)
end
end
endStack Overflow用户
发布于 2013-01-27 03:51:34
这个答案是谷歌上“工厂女孩分享协会”的第一个结果，来自santuxus的答案真的帮了我很大的忙:)
下面是最新版本的Factory Girl的语法更新，以防其他人偶然发现：
FactoryGirl.define do
factory :relationship do
guardian
relationship_type RelationshipType.first
after(:build) do |relationship|
relationship.student = FactoryGirl.create(:student, school: relationship.guardian.school) unless relationship.student.present?
end
end
endunless子句防止student在与FactoryGirl.create(:relationship, student: foo)一起传入工厂时被替换。
Stack Overflow用户
发布于 2015-10-06 00:47:42
有一种更清晰的方式来编写这种关联。从this github issue那里得到了答案。
FactoryGirl.define do
factory :relationship do
association :guardian
student { build(:student, school: relationship.guardian.school) }
relationship_type RelationshipType.first
end
end页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/8820114
复制相关文章
相似问题
腾讯云开发者
