RSPEC测试未能发布一个；创建；嵌套资源的操作

我有一个名为“参数”的资源，它嵌套在API中的“测试”下。其关系如下：“一个测试有许多参数”。我的路线安排如下

测试/：测试id/参数/：参数id

我的

rake路由

给出：

test_参数GET/tests/：test_id/参数（：format）参数#索引{：format=>：json}
POST/tests/：test_id/参数（：format）参数#创建{：format=>：json}
new_test_参数GET/tests/：test_id/parameters/new（：format）参数35; new{：format=>：json}
edit_test_parameter GET/tests/：test_id/parameters/：id/edit（：format）参数35; edit{：format=>：json}
test_参数GET/tests/：test_id/parameters/：id（：format）参数35; show{:format=>：json}
补丁/测试/：测试id/参数/：id（：格式）参数#更新{：格式=>：json}
PUT/tests/：test_id/parameters/：id（：format）parameters#update{：format=>：json}
DELETE/tests/：test_id/parameters/：id（：format）parameters 35; destroy{：format=>：json}

我正在编写简单的测试来测试API的所有典型操作。现在，我的POST/CREATE给了我一个非常令人费解的错误

故障：
1） ParametersController使用名称和时间成功创建具有有效属性的新参数
失败/错误：post:create，：test\u id=>@test.id，参数：parameter.attributes，格式：：json
命名错误：
未定义的方法“参数\ url”#
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u dispatch/routing/polymorphic\u routes.rb:220:in“polymorphic\u方法”
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u dispatch/routing/polymorphic\u routes.rb:114:in“polymorphic\u url”
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u dispatch/routing/url\u for.rb:163:in'url\u for'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/rendering.rb:95:在“进程选项”中
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/streaming.rb:200:在“进程选项”中
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/renders.rb:43:in`block in\u render\u to\u body\u with\u renderer'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/renders.rb:41:in`_render\u to_body\u with_renderer'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/renderers.rb:37:“渲染到主体”
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/abstract\u controller/rendering.rb:25:在“render”中
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/rendering.rb:16:in'render'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/instrumentation.rb:44:in `渲染中的块（2层）'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active\u support/core\u ext/benchmark.rb:12:in`block in ms'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active\u support/core\u ext/benchmark.rb:12:in`ms'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/instrumentation.rb:44:在“渲染中的块”中
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/instrumentation.rb:87:在“清理”视图中
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activerecord-4.2.2/lib/active\u record/railties/controller\u runtime.rb:25:in“cleanup\u view\u runtime”
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/instrumentation.rb:43:in'render'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action\u controller/responder.rb:258:in“display”
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action\u controller/responder.rb:214:in'api\u behavior'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action\u controller/responder.rb:191:“救援格式”
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action\u controller/responder.rb:185:to\u格式
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action\u controller/responder.rb:163:in“respond”
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action\u controller/responder.rb:156:in'call'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action\u controller/respond\u with.rb:203:in“respond\u with”
#./app/controllers/parameters\u controller.rb:13:in'create'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/implicit\u render.rb:4:在“发送动作”中
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/abstract\u controller/base.rb:198:in'process\u action'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action\u controller/metal/rendering.rb:10:in'process\u action'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/abstract\u controller/callbacks.rb:20:in`block in process\u action'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active\u support/callbacks.rb:117:in'call'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active\u support/callbacks.rb:117:in'call'
#/Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active\u support/callbacks.rb:555:in `编译中的块（2个级别）'
#/Users/naseem.alnaji/.rvm/
    "spec/controllers/parameters_controller_spec.rb"
    require 'spec_helper'
    describe ParametersController do
      before :each do
        @test = FactoryGirl.create(:test, id: 1, name: 'Eccentric Tech')
        @test.save
      end

      # ...

      describe 'POST create a new parameter' do
        context 'with valid attributes' do
          it 'successfully with name and times' do
            parameter = FactoryGirl.build(:parameter)
            expect {
              post :create, :test_id => @test.id, parameter: parameter.attributes, format: :json
            }.to change(Parameter, :count).by(1)
          end
        end
        context 'with invalid attributes' do
          it 'fails without a name' do
            parameter = FactoryGirl.build(:no_name_parameter)
            expect {
              post :create, :test_id => @test.id, parameter: parameter.attributes, format: :json
            }.to change(Parameter, :count).by(0)
          end
          it 'fails without belonging to a test' do
            parameter = FactoryGirl.build(:no_test_parameter)
            expect {
              post :create, :test_id => @test.id, parameter: parameter.attributes, format: :json
            }.to change(Parameter, :count).by(0)
          end
        end
      end

      # ...

    end

"spec/factories/parameters.rb"
require 'faker'

FactoryGirl.define do
  factory :parameter do |f|
    f.name { "#{Faker::Hacker.noun}" }
    f.value { Faker::Number.number(2) }
    f.test_id { 1 }
  end

  factory :no_name_parameter, parent: :parameter do |f|
    f.name nil
    f.value { Faker::Number.number(2) }
    f.test_id { 1 }
  end

  factory :no_test_parameter, parent: :parameter do |f|
    f.name { "#{Faker::Hacker.noun}" }
    f.value { Faker::Number.number(2) }
    f.test_id nil
  end
end

class ParametersController < ApplicationController
  respond_to :json

  def index
    respond_with Parameter.all
  end

  def show
    respond_with Parameter.find(params[:id])
  end

  def create
      respond_with Parameter.create(parameter_params)
  end

  def update
    respond_with Parameter.update(params[:id], parameter_params)
  end

  def destroy
    respond_with Parameter.destroy(params[:id])
  end

  private
    def parameter_params
      params.require(:parameter).permit(:name, :value, :test_id)
    end
end

Rails.application.routes.draw do
  scope :defaults => { :format => :json } do
    resources :services do
      resources :tests
    end

    resources :tests do
      resources :parameters
      resources :singular_results
      resources :dataset_results
    end
  end
end

def create
  respond_with Parameter.create(parameter_params), location: nil
end