Rails邪恶的宝石 - 在一个向导中使用两个（嵌套）模型

Question

我想在用户注册成功后向我的向导使用邪恶宝石。

第一步是用户应该输入他的“普通信息”（生物和兴趣）。提交这些信息后，用户应输入一个特征（用户有很多特征）。

我遇到的问题如下：如何正确使用Wicked为第一步用户模型和第二步（属于用户）的特征模型创建表单？

我得到的错误是：

Can't mass-assign protected attributes: characteristics 

我不想使用嵌套的属性，因为向导会在那里我会用他们的唯一地方。

这里是我的源代码：

邪恶 - 控制器：

#!/bin/env ruby 
# encoding: utf-8 
class AfterFirstSignInController < ApplicationController 
    include Wicked::Wizard 

    skip_before_filter :check_if_profile_complete, only: [:show, :update] 

    steps :general_infos, :characteristics 

    def show 
    @user = current_user 
    @characteristic = @user.characteristics.new 
    @title = t('controllers.after_first_sign_in_controller.show.title') 
    render_wizard 
    end 

    def update 
    @user = current_user 
    @characteristic = @user.characteristics.new 
    case step 
     when :general_infos 
     @user.attributes = params[:user] 
     render_wizard @user 
     else 
     @characteristic.attributes = params[:characteristic] 
     render_wizard @characteristic 
    end 
    end 
end 

“一般-相关信息形式的”

.container 
    .row 
    .span5.offset3 
     .progress.progress-info.progress-striped 
     .bar(style='width: 50%') 
      1/2 
     .page-header 
     %h1 
      = t('views.after_first_sign_in.general_infos.h1') 
     = form_for(@user, url: wizard_path, method: :put) do |f| 
     = render 'shared/error_messages', object: @user 
     .control-group 
      %label.control-label(for='bio') 
      = t('views.after_first_sign_in.general_infos.labels.bio') 
      .controls 
      = f.text_area :bio, id: 'bio', rows: '6' 
     .control-group 
      %label.control-label(for='interest_list') 
      = t('views.after_first_sign_in.general_infos.labels.interest_list') 
      .controls 
      = f.text_field :interest_list, id: 'interest_list' 
     .form-actions 
      = f.submit t('views.after_first_sign_in.general_infos.buttons.submit'), disable_with: t('views.after_first_sign_in.general_infos.buttons.submit'), class: 'btn btn-primary pull-right' 

“特色型“

.container 
    .row 
    .span5.offset3 
     .progress.progress-info.progress-striped 
     .bar(style='width: 100%') 
      2/2 
     .page-header 
     %h1 
      = t('views.after_first_sign_in.characteristics.h1') 
     = form_for([@user, @characteristic], url: wizard_path, method: :put) do |f| 
     = render 'shared/error_messages', object: @characteristic 
     = f.fields_for :characteristics do |builder| 
      .control-group 
      %label.control-label(for='title') 
       = t('views.after_first_sign_in.characteristics.labels.title') 
      .controls 
       = builder.text_field :title, id: 'title' 
      .control-group 
      %label.control-label(for='description') 
       = t('views.after_first_sign_in.characteristics.labels.description') 
      .controls 
       = builder.text_area :description, id: 'description', rows: '6' 
     .form-actions 
      = f.submit t('views.after_first_sign_in.characteristics.buttons.submit'), disable_with: t('views.after_first_sign_in.characteristics.buttons.submit'), class: 'btn btn-primary pull-right' 
      = link_to t('views.after_first_sign_in.characteristics.buttons.general_infos_step'), after_first_sign_in_path(:general_infos), class: 'btn' 

的路由文件

Test::Application.routes.draw do 
    scope '(:locale)' do 
    resources :users do 
     resources :characteristics 
     resources :followings, only: [:create, :destroy, :index] 
     resources :wall_entries, only: [:create, :destroy] 
     resources :messages, only: [:create, :destroy, :index] 
    end 

    resources :characteristics do 
     resources :votes, only: [:create, :destroy] 
    end 

    resources :after_first_sign_in 

    match '/auth/:provider/callback', to: 'sessions#create' 
    match '/auth/failure', to: redirect('/') 
    match '/sign_out', to: 'sessions#destroy', as: 'sign_out' 

    match '/change_locale', to: 'users#change_locale', as: 'change_locale' 
    match '/home', to: 'users#home', as: 'home' 
    match '/discover', to: 'users#discover', as: 'discover' 

    match '/terms_of_service', to: 'pages#terms_of_service' 
    match '/masthead', to: 'pages#masthead' 
    match '/privacy', to: 'pages#privacy' 

    root to: 'pages#index' 
    end 
end 

非常感谢您！

Answer 1

我猜你正在使用nested_attributes为@user.characteristics。如果是这样，那么你应该将以下添加到您的用户模型：

attr_accessible :characteristics_attributes 
accepts_nested_attributes_for :characteristics 

但也未尝不是在您的characteristics-form这部分清楚，你可能想是这样的：

= form_for(@user, url: wizard_path, method: :put) do |f| 
    = render 'shared/error_messages', object: @user 
    = f.fields_for :characteristics do |builder| 

需要注意的是，fields_for可能会遍历每个特征单独和渲染为他们每个人的领域，所以你不需要关心@characteristic