未經許可的參數中有和屬於很多協會

Question

我想創建一個用戶模型和行業模型的軌道4應用程序。他們之間有一個has_and_belongs_to_many關聯。我按照指南創建了連接表http://guides.rubyonrails.org/association_basics.html 我收到:industry_ids的允許參數。所以我也跟着上strong parameters

class ApplicationController < ActionController::Base 
    before_filter :configure_permitted_parameters, if: :devise_controller? 

    # Prevent CSRF attacks by raising an exception. 
    # For APIs, you may want to use :null_session instead. 
    protect_from_forgery with: :exception 

    protected 

    def configure_permitted_parameters 
    devise_parameter_sanitizer.for(:sign_up) << :about 
    devise_parameter_sanitizer.for(:sign_up) << :industry_ids 
    end 
end 

的色器件部分但當我讀到這裏http://blog.sensible.io/2013/08/17/strong-parameters-by-example.html，用於關聯這樣我要告訴軌，這是一個數組。

如何解決使用:industries關聯創建用戶的問題？

Answer 1

我結束了使用一個塊。

class ApplicationController < ActionController::Base 
    before_filter :configure_permitted_parameters, if: :devise_controller? 

    # Prevent CSRF attacks by raising an exception. 
    # For APIs, you may want to use :null_session instead. 
    protect_from_forgery with: :exception 

    protected 

    def configure_permitted_parameters 
    devise_parameter_sanitizer.for(:sign_up) { |u| 
     u.permit(:email, :password, :password_confirmation, 
       :about, industry_ids: []) } 
    end 
end