工厂女孩belongs_to的：CLASS_NAME

Question

我有一个role_definitions表的模式：

create_table "role_definitions", :force => true do |t| 
    t.integer "role_id" 
    t.integer "profile_id" 
    t.datetime "created_at",       :null => false 
    t.datetime "updated_at",       :null => false 
    t.integer "patient_resource_id", :default => 1, :null => false 
    end 

    add_index "role_definitions", ["patient_resource_id"], :name => "index_role_definitions_on_patient_profile_id" 
    add_index "role_definitions", ["profile_id"], :name => "index_role_definitions_on_profile_id" 
    add_index "role_definitions", ["role_id"], :name => "index_role_definitions_on_role_id" 

和模型RoleDefinition：

class RoleDefinition < ActiveRecord::Base 
    attr_accessible :patient_profile_id, :role_id, :profile_id 

    belongs_to :role 
    belongs_to :profile 
    belongs_to :patient_resource, :class_name => :resource 

    has_many :resource_authorizations 
    has_many :resources, :through => :resource_authorizations 

    validates :profile, :role, :patient_resource, :presence => true 

    def role_information 
    "Profile: " + self.profile.full_name + ", Role: " + self.role.role + "Patient: " + self.patient_resource.resource_label 
    end 
end 

和FactoryGirl工厂：

require 'faker' 

FactoryGirl.define do 
    factory :role_definition do |f| 
    rt = ResourceType.where(:resource_type => "Patient").first_or_create() 
    p = Resource.where(:fhir_base_url_id => 1, :fhir_resource_id => 1, :resource_type_id => rt.id).first_or_create() 
    f.patient_resource_id { p.id } 
    association :role 
    association :profile 
    end 
end 

我也尝试过：

require 'faker' 

FactoryGirl.define do 
    factory :role_definition do |f| 
    association :role 
    association :profile 
    association :patient_resource, :factory => :resource 
    end 
end 

和许多其他尝试。

有一个RSpec测试，role_definition_spec.rb：

require 'rails_helper' 

RSpec.describe RoleDefinition, :type => :model do 
    it "has a valid factory" do 
    expect(FactoryGirl.build(:role_definition)).to be_valid 
    end 
# 
# it "must have an role_definition" do 
# expect(FactoryGirl.build(:role_definition, :role => nil)).to be_invalid 
# end 
# 
# it "must have a resource" do 
# expect(FactoryGirl.build(:role_definition, :profile => nil)).to be_invalid 
# end 
# 
# it "must have a patient resource" do 
# expect(FactoryGirl.build(:role_definition, :patient_resource => nil)).to be_invalid 
# end 
end 

使用第二工厂实例中（该匹配的例子，我可以在网上找到，并在这一点上我不关心，我只希望它构建任何旧的资源并将其安装），RSpec的失败，出现错误：

Failures: 

    1) RoleDefinition has a valid factory 
    Failure/Error: expect(FactoryGirl.build(:role_definition)).to be_valid 
    NameError: 
     uninitialized constant RoleDefinition::resource 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/inheritance.rb:111:in `compute_type' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/reflection.rb:172:in `klass' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/associations/association.rb:202:in `raise_on_type_mismatch' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/associations/belongs_to_association.rb:6:in `replace' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/associations/singular_association.rb:17:in `writer' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/activerecord-3.2.13/lib/active_record/associations/builder/association.rb:51:in `block in define_writers' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:16:in `public_send' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:16:in `block (2 levels) in object' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:15:in `each' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:15:in `block in object' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:14:in `tap' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:14:in `object' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/evaluation.rb:12:in `object' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/strategy/build.rb:9:in `result' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/factory.rb:42:in `run' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/factory_runner.rb:23:in `block in run' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/activesupport-3.2.13/lib/active_support/notifications.rb:125:in `instrument' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/factory_runner.rb:22:in `run' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/factory_girl-4.5.0/lib/factory_girl/strategy_syntax_method_registrar.rb:20:in `block in define_singular_strategy_method' 
    # ./spec/models/role_definition_spec.rb:5:in `block (2 levels) in <top (required)>' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/zeus-0.15.4/lib/zeus/rails.rb:216:in `test' 
    # ./custom_plan.rb:7:in `test' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/zeus-0.15.4/lib/zeus.rb:148:in `block in command' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/zeus-0.15.4/lib/zeus.rb:135:in `fork' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/zeus-0.15.4/lib/zeus.rb:135:in `command' 
    # /home/jfreivald/.rvm/gems/ruby-1.9.3-p551/gems/zeus-0.15.4/lib/zeus.rb:50:in `go' 
    # -e:1:in `<main>' 

Finished in 1.25 seconds (files took 3 minutes 39.9 seconds to load) 
1 example, 1 failure 

Failed examples: 

rspec ./spec/models/role_definition_spec.rb:4 # RoleDefinition has a valid factory 

在玩其他的对象是资源：

class Resource < ActiveRecord::Base 
    require 'rest-client' 

    attr_accessible :fhir_base_url_id, :resource_type_id, :fhir_resource_id 

    belongs_to :resource_type 
    belongs_to :fhir_base_url 

    has_many :resource_authorizations 
    has_many :role_definitions, :through => :resource_authorizations 
    has_many :profiles, :through => :role_definitions 

    validates :resource_type_id, :fhir_base_url_id, :fhir_resource_id, :presence => true 
    validates_associated :resource_type, :fhir_base_url 
    validates_uniqueness_of :fhir_resource_id, :scope => [ :fhir_base_url_id, :resource_type_id ] 

# support functions removed 

end 

和的ResourceType：

class ResourceType < ActiveRecord::Base 
    attr_accessible :resource_type 

    validates :resource_type, :presence => true, :uniqueness => true 
end 

在我看来，该reference patient_resource试图为自己分配到RoleDefinition::resource，不存在为resource，但作为patient_resource。

对于此应用程序的所有其他600+测试工作，除了那些依赖于此应用程序的测试。

问题是：什么是正确的语法让FactoryGirl创建ResourceType为'Patient'的资源，并将其分配给RoleDefinition中的:patient_resource参考。

我使用Ruby 1.9.3p551，Rails 3.2.13（以保持与我的托管站点的兼容性）和factory_girl_rails 4.5.0。

谢谢。

Answer 1

里面的RoleDefinition，这条线：

belongs_to :patient_resource, :class_name => :resource 

应改为：

belongs_to :patient_resource, :class_name => 'Resource'