Ruby on rails Mongoid自引用，接受\u嵌套的\u属性\u

型号：

测试：

带-b的输出：

describe Plan do
  it "should always have a name" do
    plan = Plan.new
    plan.save.should == false
    plan[:name] = "World Domination"
    plan.save.should == true
  end
  it "should allow nested plan creation" do
    plan = Plan.new(:name => "World Domination", :sub_plans_attributes => {
      :name => "Get $50b",
      :sub_plans_attributes => {
        :name => "Invent"
      }
    });
    plan.sub_plans.count.should == 1
    plan.sub_plans.first.name.should == "Get $50b"
    plan.sub_plans.first.sub_plans.count.should == 1
    plan.sub_plans.first.sub_plans.first.name.should == "Invent"
  end
end

运行规范/模型/计划\u规范.rb
F
失败：
1） 计划应允许创建嵌套计划
失败/错误：plan=plan.new（：name=>“世界主宰”，：sub\u plan\u attributes=>{
类型错误：
无法将符号转换为字符串
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:67:in'delete'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:67:在“可销毁”中
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:103:在“进程”中
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:30:in“block in build”
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:26:in'each'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:26:in'build'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/nested_attributes.rb:47:in`block（3层）in接受_nested_attributes_for'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes.rb:193:in`\u
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/nested_attributes.rb:45:in`block（2层）in接受_nested_attributes_for'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:111:in'block-in-process_-nested'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:110:in'each_pair'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:110:in'process_-nested'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:122:in'process_pending'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:29:in'process'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/document.rb:131:in`block in initialize'
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders.rb:47:in `"u building `
#/usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/document.rb:127:in'initialize'
#./spec/models/plan_spec.rb:11:in‘new’
#./spec/models/plan_spec.rb:11:in‘分块（2层）’in’
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example.rb:48:in'instance_eval'
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example.rb:48:in'block in run'
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example.rb:107:in`will_-arou_钩子'
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example.rb:45:在“运行”中
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:294:在“运行中的块_示例”中
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:290:在“地图”中
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:290:in“run_examples”
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:262:in'run'
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_-line.rb:24:in`block（2个级别）in run'
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:24:in'map'
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_-line.rb:24:in'block in run'
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/reporter.rb:12:in“报告”
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_-line.rb:21:in'run'
#/usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/monkey/spork/test_framework/rspec.rb:5:运行测试中
#/usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/run_-strategy/forking.rb:13:in'block-in-run'
#/usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/forker.rb:21:in'block in initialize'
#/usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/forker.rb:18:in'fork'
#/usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/forker.rb:18:in'initialize'
#/usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/run_strategy/forking.rb:9:in'new'
#/usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/run_strategy/forking.rb:9:in“run”
#/usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/server.rb:48:in'run'
#/usr/lib/ruby/1.9.1/drb/drb.rb:1558:in'perform_without_block'
#/usr/lib/ruby/1.9.1/drb/drb.rb:1518:in'perform'
#/usr/lib/ruby/1.9.1/drb/drb.rb:1592:in `主循环中的块（2个级别）'
#/usr/lib/ruby/1.9.1/drb/drb.rb:1588:in'loop'
#/usr/lib/ruby/1.9.1/drb/drb.rb:1588:in'block in main_循环'
以0.00917秒完成
2例，1例失败
失败的示例：
rspec./spec/models/plan_spec.rb:10#计划应允许创建嵌套计划

---

为什么我会出现这个错误，我如何才能让我的许多自我参考工作？我使用的是Mongoid版本2.3.1和Rails版本3.1.1。谢谢

在花了几个小时尝试几种不同的组合，最后放弃并睡了一觉之后，我终于让它工作了！模型：

Running spec/models/plan_spec.rb
.F

Failures:

  1) Plan should allow nested plan creation
     Failure/Error: plan = Plan.new(:name => "World Domination", :sub_plans_attributes => {
     TypeError:
       can't convert Symbol into String
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:67:in `delete'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:67:in `destroyable?'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:103:in `process'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:30:in `block in build'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:26:in `each'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders/nested_attributes/many.rb:26:in `build'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/nested_attributes.rb:47:in `block (3 levels) in accepts_nested_attributes_for'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes.rb:193:in `_assigning'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/nested_attributes.rb:45:in `block (2 levels) in accepts_nested_attributes_for'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:111:in `block in process_nested'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:110:in `each_pair'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:110:in `process_nested'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:122:in `process_pending'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/attributes/processing.rb:29:in `process'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/document.rb:131:in `block in initialize'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/relations/builders.rb:47:in `_building'
     # /usr/lib/ruby/gems/1.9.1/gems/mongoid-2.3.1/lib/mongoid/document.rb:127:in `initialize'
     # ./spec/models/plan_spec.rb:11:in `new'
     # ./spec/models/plan_spec.rb:11:in `block (2 levels) in <top (required)>'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example.rb:48:in `instance_eval'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example.rb:48:in `block in run'
         # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example.rb:107:in `with_around_hooks'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example.rb:45:in `run'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:294:in `block in run_examples'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:290:in `map'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:290:in `run_examples'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:262:in `run'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:24:in `block (2 levels) in run'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:24:in `map'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:24:in `block in run'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/reporter.rb:12:in `report'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:21:in `run'
     # /usr/lib/ruby/gems/1.9.1/gems/rspec-core-2.6.4/lib/rspec/monkey/spork/test_framework/rspec.rb:5:in `run_tests'
     # /usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/run_strategy/forking.rb:13:in `block in run'
     # /usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/forker.rb:21:in `block in initialize'
     # /usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/forker.rb:18:in `fork'
     # /usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/forker.rb:18:in `initialize'
     # /usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/run_strategy/forking.rb:9:in `new'
     # /usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/run_strategy/forking.rb:9:in `run'
     # /usr/lib/ruby/gems/1.9.1/gems/spork-0.9.0.rc9/lib/spork/server.rb:48:in `run'
     # /usr/lib/ruby/1.9.1/drb/drb.rb:1558:in `perform_without_block'
     # /usr/lib/ruby/1.9.1/drb/drb.rb:1518:in `perform'
     # /usr/lib/ruby/1.9.1/drb/drb.rb:1592:in `block (2 levels) in main_loop'
     # /usr/lib/ruby/1.9.1/drb/drb.rb:1588:in `loop'
     # /usr/lib/ruby/1.9.1/drb/drb.rb:1588:in `block in main_loop'

Finished in 0.00917 seconds
2 examples, 1 failure

Failed examples:

rspec ./spec/models/plan_spec.rb:10 # Plan should allow nested plan creation

测试：

class Plan
  include Mongoid::Document
  # Fields
  field :name, type: String

  # Relationships
  has_and_belongs_to_many :subplans, :inverse_of => :parents,  :class_name => 'Plan', :autosave => true
  has_and_belongs_to_many :parents,  :inverse_of => :subplans, :class_name => 'Plan', :autosave => true
  accepts_nested_attributes_for :subplans

  # Validations
  validates_presence_of :name
end

描述计划执行情况
它“应该总是有一个名字”吗
计划=计划。新
plan.save.should==false
计划[：名称]=“统治世界”
plan.save.should==true
结束
它“应该有嵌套关系”吗
root=计划。创建名称：“父计划”
child1=root.subplans.create name:“子计划#1”
child2=计划。创建名称：“子计划#2”
root.subplans“root”，
：子计划_属性=>[{：名称=>“子”}]
plan.save；plan.reload
plan.subplans.size.should==1
plan.subplans.first.name.should==“子项”
结束
结束

class Plan
  include Mongoid::Document
  # Fields
  field :name, type: String

  # Relationships
  has_and_belongs_to_many :subplans, :inverse_of => :parents,  :class_name => 'Plan', :autosave => true
  has_and_belongs_to_many :parents,  :inverse_of => :subplans, :class_name => 'Plan', :autosave => true
  accepts_nested_attributes_for :subplans

  # Validations
  validates_presence_of :name
end

describe Plan do
  it "should always have a name" do
    plan = Plan.new
    plan.save.should == false
    plan[:name] = "World Domination"
    plan.save.should == true
  end
  it "should have a nested relationship" do
    root   = Plan.create          name: "Parent Plan"
    child1 = root.subplans.create name: 'Child Plan #1'
    child2 = Plan.create          name: "Child Plan #2"
    root.subplans << child2

    root.subplans.size.should == 2
    child1.parents.size.should == 1
    child1.parents.first.should == root
    child2.parents.size.should == 1
    child2.parents.first.should == root
  end
  it "should accept nested attributes for subplans" do
    plan = Plan.new :name => "root",
      :subplans_attributes => [{:name => "child"}]
    plan.save; plan.reload
    plan.subplans.size.should == 1
    plan.subplans.first.name.should == "child"
  end
end