Я пытался выяснить это в течение нескольких дней. Я использую Rails 4 (с обновленной техникой массового назначения) и пытаюсь использовать вложенные атрибуты с отношением «многие ко многим». Моя запись сохраняется в БД, но все равно нулю, и я 'я получаюНедопустимые параметры: школа, выпускники, перспективы » ошибка в моих логах.

Вот'Что у меня есть:

referral.rb

class Referral < ActiveRecord::Base
 belongs_to :school
 belongs_to :alumni
 belongs_to :prospect
end

alumni.rb

class Alumni < ActiveRecord::Base
  has_many :referrals
  has_many :prospects, through: :referrals

  accepts_nested_attributes_for :referrals
end

school.rb

class School < ActiveRecord::Base
  has_many :referrals
  has_many :prospects, through: :referrals
  has_many :alumnis, through: :referrals

  accepts_nested_attributes_for :referrals
end

prospect.rb

class Prospect < ActiveRecord::Base
  has_many :referrals
  has_many :alumnis, through: :referrals

  accepts_nested_attributes_for :referrals
end

referrals_controller.rb

def create
  @referral = Referral.create(referral_params)

  respond_to do |format|
    if @referral.save
      # ReferralMailer.referrer_email(@referral).deliver
      # ReferralMailer.referral_email(@referral).deliver
      format.html { redirect_to @referral, notice: 'Referral was successfully created.' }
      format.json { render action: 'show', status: :created, location: @referral }
    else
      format.html { render action: 'new' }
      format.json { render json: @referral.errors, status: :unprocessable_entity }
    end
  end
end

private
  # Use callbacks to share common setup or constraints between actions.
  def set_referral
    @referral = Referral.find(params[:id])
  end

  # Never trust parameters from the scary internet, only allow the white list through.
  def referral_params
    params.require(:referral).permit(prospects_attributes: [:first_name, :last_name, :email], alumnis_attributes: [:first_name, :last_name, :email], schools_attributes: [:name])

  end

_form.html.erb

  
    
       prohibited this referral from being saved:

      
      
        
      
      
    
  

  
    
    
  

  
    
    

    
    

    
    
  

  
    
    

    
    

    
    
  
  
    
  

вывод журнала сервера

Processing by ReferralsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"Ee+rREUU/0wGzNFTEaMxr8oRStaA53X9fmDrlVRyrD8=", "referral"=>{"school"=>{"name"=>"asdf"}, "alumnis"=>{"first_name"=>"asdf", "last_name"=>"asfd", "email"=>"asdf"}, "prospects"=>{"first_name"=>"asdf", "last_name"=>"asdf", "email"=>"asdf"}}, "commit"=>"Create Referral"}
Unpermitted parameters: school, alumnis, prospects
   (0.1ms)  begin transaction
  SQL (0.5ms)  INSERT INTO "referrals" ("created_at", "updated_at") VALUES (?, ?)  [["created_at", Fri, 12 Jul 2013 03:49:06 UTC +00:00], ["updated_at", Fri, 12 Jul 2013 03:49:06 UTC +00:00]]
   (0.6ms)  commit transaction
   (0.1ms)  begin transaction
   (0.1ms)  commit transaction
Redirected to http://localhost:3000/referrals/68

Реферальная запись

=> #