「未定義的方法`元數據爲..」導軌

Question

嗨，我有這個問題運行spec文件。 這是reparator型號：

class Reparator < User 
    include Mongoid::Document 
    include Mongoid::Timestamps 
    field :private_reparator, :type => Boolean, :default => true 
    field :brand_name, :type => String 
    field :year_of_experience, :type => Integer, :default => 1 

    has_many :reparations 
    has_many :skills 

    validates_presence_of :skills, :year_of_experience 
    validates :year_of_experience, :numericality => {:greater_than_or_equal_to => 0} 
end 

這是技能模型：

class Skill 
    include Mongoid::Document 

    field :name, :type => String 

    belongs_to :reparator 

    validates_presence_of :name 
    validates_uniqueness_of :name 

end 

這是控制器：

class ReparatorsController < ApplicationController 
    respond_to :json 

    def index 
    @reparators = Reparator.all 
    respond_with @reparators 
    end 

    def show 
    @reparator = Reparator.find(params[:id]) 
    respond_with @reparator 
    end 

    def create 
    @reparator = Reparator.new(params[:reparator]) 
    @reparator.skills = params[:skills] 
    if @reparator.save 
     respond_with @reparator 
    else 
     respond_with @reparator.errors 
    end 
    end 

    def update 
    @reparator = Reparator.find(params[:id]) 

    if @reparator.update_attributes(params[:reparator]) 
     respond_with @reparator 
    else 
     respond_with @reparator.errors 
    end 
    end 

    def destroy 
    @reparator = Reparator.find(params[:id]) 
    @reparator.destroy 
    respond_with "Correctly destroyed" 
    end 

end 

這是針對該控制器規範文件（我我只是把沒有通過的測試）：

it "Should create an reparator" do 
     valid_skills = [FactoryGirl.create(:skill).id, FactoryGirl.create(:skill).id] 
     valid_attributes = {:name => "Vianello", 
          :email => "maremma@gmail.com", 
          :address => "viale ciccio", 
          :private_reparator => true 
          } 
     post :create, :reparator => valid_attributes, :skills => valid_skills 
     assigns(:reparator).should be_a Reparator 
     assigns(:reparator).should be_persisted 
    end 

這是技能廠女孩：

FactoryGirl.define do 
    factory :skill do 
    sequence(:name) {|n| "skill#{n}"} 
    end 
end 

Answer 1

我認爲這是在您的規範中的一個錯字。改爲post :create, :reparator => valid_attributes, :skills => skills_ttributes應爲post :create, :reparator => valid_attributes, :skills => skills_attributes。

Answer 2

壞線是這一個

@reparator.skills = params[:skills] 

params[:skills]是字符串（已經傳遞的ID），但skills=方法期望被給予的實際Skill實例等鼓起的陣列。

除了skills=，mongoid還爲您提供了一個skill_ids=方法，它允許您通過只分配一個ID數組來更改關聯的對象。或者，加載技能對象你的自我，然後@reparator.skills = skills