我有一个名为“参数”的资源，它嵌套在我的API中的“tests”下。关系如下：“测试有很多参数”。我按照以下方式构建了我的路线
测试/：为test_id /参数/：parameter_id
我的rake routes给出了：
test_parameters GET /tests/:test_id/parameters(.:format) parameters#index {:format=>:json}
POST /tests/:test_id/parameters(.:format) parameters#create {:format=>:json}
new_test_parameter GET /tests/:test_id/parameters/new(.:format) parameters#new {:format=>:json}
edit_test_parameter GET /tests/:test_id/parameters/:id/edit(.:format) parameters#edit {:format=>:json}
test_parameter GET /tests/:test_id/parameters/:id(.:format) parameters#show {:format=>:json}
PATCH /tests/:test_id/parameters/:id(.:format) parameters#update {:format=>:json}
PUT /tests/:test_id/parameters/:id(.:format) parameters#update {:format=>:json}
DELETE /tests/:test_id/parameters/:id(.:format) parameters#destroy {:format=>:json}
我正在编写简单的rspec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。
Failures:
1) ParametersController POST create a new parameter with valid attributes successfully with name and times
Failure/Error: post :create, :test_id => @test.id, parameter: parameter.attributes, format: :json
NoMethodError:
undefined method `parameter_url' for #<ParametersController:0x000001072b4280>
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/polymorphic_routes.rb:220:in `polymorphic_method'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/polymorphic_routes.rb:114:in `polymorphic_url'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_dispatch/routing/url_for.rb:163:in `url_for'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/rendering.rb:95:in `_process_options'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/streaming.rb:200:in `_process_options'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/renderers.rb:43:in `block in _render_to_body_with_renderer'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/renderers.rb:41:in `_render_to_body_with_renderer'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/renderers.rb:37:in `render_to_body'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/abstract_controller/rendering.rb:25:in `render'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/rendering.rb:16:in `render'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/instrumentation.rb:44:in `block (2 levels) in render'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/core_ext/benchmark.rb:12:in `block in ms'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/core_ext/benchmark.rb:12:in `ms'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/instrumentation.rb:44:in `block in render'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/instrumentation.rb:87:in `cleanup_view_runtime'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activerecord-4.2.2/lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/instrumentation.rb:43:in `render'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action_controller/responder.rb:258:in `display'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action_controller/responder.rb:214:in `api_behavior'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action_controller/responder.rb:191:in `rescue in to_format'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action_controller/responder.rb:185:in `to_format'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action_controller/responder.rb:163:in `respond'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action_controller/responder.rb:156:in `call'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/responders-2.1.0/lib/action_controller/respond_with.rb:203:in `respond_with'
# ./app/controllers/parameters_controller.rb:13:in `create'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/abstract_controller/base.rb:198:in `process_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/rendering.rb:10:in `process_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/callbacks.rb:117:in `call'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/callbacks.rb:117:in `call'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/callbacks.rb:505:in `call'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/callbacks.rb:505:in `call'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/callbacks.rb:92:in `_run_callbacks'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/callbacks.rb:776:in `_run_process_action_callbacks'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/callbacks.rb:81:in `run_callbacks'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/abstract_controller/callbacks.rb:19:in `process_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/rescue.rb:29:in `process_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/notifications.rb:164:in `block in instrument'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activesupport-4.2.2/lib/active_support/notifications.rb:164:in `instrument'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/activerecord-4.2.2/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/abstract_controller/base.rb:137:in `process'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionview-4.2.2/lib/action_view/rendering.rb:30:in `process'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/test_case.rb:632:in `process'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/test_case.rb:65:in `process'
# /Users/naseem.alnaji/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.2/lib/action_controller/test_case.rb:514:in `post'
# ./spec/controllers/parameters_controller_spec.rb:34:in `block (5 levels) in <top (required)>'
# ./spec/controllers/parameters_controller_spec.rb:33:in `block (4 levels) in <top (required)>'
我已经尝试更改我提交POST的格式，但没有改变任何内容。现在，我的rspec测试看起来像这样：
"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
我的工厂：
"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
最后，我的控制器：
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
routes.rb中：
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
答案 0 :(得分：0)
我自己解决了这个问题，但我不知道为什么会这样。如果有人可以解释，请执行：）
我所做的就是对我的控制器进行一些小改动：
import java.nio.{ByteBuffer, ByteOrder}
def bytesToShort(byte1: Byte, byte2: Byte) : Short = {
ByteBuffer
.allocate(2)
.order(ByteOrder.LITTLE_ENDIAN)
.put(byte1)
.put(byte2)
.getShort(0)
}
val bytes = Array[Byte](1, 2, 3, 4)
bytes.grouped(2).map {
case Array(one) => bytesToShort(one, 0.toByte)
case Array(one, two) => bytesToShort(one, two)
}.toArray
找到了一个很好的解释：http://meowcrypt.com/