Rails 3：創建身份驗證時更新用戶屬性

Question

我遵循Railscasts＃235和＃236設置使用omniauth創建用戶身份驗證。 http://railscasts.com/episodes/235-omniauth-part-1 http://railscasts.com/episodes/236-omniauth-part-2

我對所謂的用戶模型2個布爾屬性：facebok_share和：twitter_share，我想，當一個新的設置爲true身份驗證已創建。

我有這個爲我工作，當我創建一個新的用戶，但如果一個現有的用戶添加一個身份驗證我不能得到布爾更新爲true。

當調用apply_omniauth（omniauth）時，它會在我的用戶模型中設置self.facebook_share = true或self.twitter_share = true。

我試着添加一個名爲apply_share的新方法，它根據提供者更改布爾值，並且我試圖調用current_user.apply_share（omniauth），但在數據庫中沒有任何事情發生。

我在做什麼錯？謝謝！

##認證控制器

class AuthenticationsController < ApplicationController 

    def index 
    @title = "Authentications" 
    @authentications = current_user.authentications if current_user 
    end 

    def create 
    # creates omniauth hash and looks for an previously established authentication 
    omniauth = request.env["omniauth.auth"] 
    authentication = Authentication.find_by_provider_and_uid(omniauth['provider'], omniauth['uid']) 
    # if previous authentication found, sign in user 
    if authentication 
     flash[:notice] = "Signed in successfully" 
     sign_in_and_redirect(:user, authentication.user) 
    # for users already signed in (current_user), create a new authentication for the user 
    elsif current_user 
     current_user.apply_share(omniauth) 
     current_user.authentications.create(:provider => omniauth['provider'], :uid => omniauth['uid'], :token => (omniauth['credentials']['token'] rescue nil), 
              :secret => (omniauth['credentials']['secret'] rescue nil)) 
     flash[:notice] = "authentications successful" 
     redirect_to authentications_url 
    # new user is created and authentications are built through apply_omniauth(omniauth) 
    else 
     user = User.new 
     user.apply_omniauth(omniauth) 
     if user.save 
     flash[:notice] = "Signed in successfully" 
     sign_in_and_redirect(:user, user) 
     # if validations fail to save user, redirects to new user registration page 
     # new twitter authentications redirect so user can enter their password 
     else 
     session[:omniauth] = omniauth 
     redirect_to new_user_registration_url 
     end 
    end 
    end 

    def destroy 
    @authentication = current_user.authentications.find(params[:id]) 
    @authentication.destroy 
    flash[:notice] = "Successfully destroyed authentication." 
    redirect_to authentications_url 
    end 

end 

## user model 

# set share booleans to true depending on 'provider' type 
    def apply_share(omniauth) 
    case omniauth['provider'] 
     when 'facebook' 
     self.facebook_share = true 
     when 'twitter' 
     self.twitter_share = true 
    end 
    end 

# from authentications controller, new user split into type of provider 
def apply_omniauth(omniauth) 
    case omniauth['provider'] 
    when 'facebook' 
    self.apply_facebook(omniauth) 
    when 'twitter' 
    self.apply_twitter(omniauth) 
    end 
    # builds authentication with provider, uid, token, and secret 
    authentications.build(hash_from_omniauth(omniauth)) 
    end 

protected 

# sets new user attributes from facebook 
def apply_facebook(omniauth) 
    self.name = omniauth['user_info']['name'] 
    self.email = omniauth['user_info']['email'] if email.blank? 
    self.facebook_share = true 
end 

# sets new user attributes from twitter 
def apply_twitter(omniauth) 
    if (extra = omniauth['extra']['user_hash'] rescue false) 
    # Example fetching extra data. Needs migration to User model: 
    # self.firstname = (extra['name'] rescue '') 
    self.name = (extra['name'] rescue '') 
    self.bio = (extra['description'] rescue '') 
    end 
    self.twitter_share = true 

end 

# set authentication attributes to those from 'omniauth' hash 
def hash_from_omniauth(omniauth) 
    { 
    :provider => omniauth['provider'], 
    :uid => omniauth['uid'], 
    :token => (omniauth['credentials']['token'] rescue nil), 
    :secret => (omniauth['credentials']['secret'] rescue nil) 
    } 
end 
end 


## new methid with :before add => :apply_share 
def apply_share(authentication) 
    case authentication['provider'] 
    when 'facebook' 
     self.facebook_share = true 
    when 'twitter' 
     self.twitter_share = true 
    end 
    self.save 
end 

Answer 1

我相信你從來沒有真正節省CURRENT_USER。所以你的屬性設置爲true，然後重定向。該協會是存儲在認證模式，讓Rails的，想是有幫助的，不更新CURRENT_USER，只是認證

嘗試的新實例：

current_user.apply_share(omniauth) 
current_user.save 

，看看能否解決。現在如果是這樣，我強烈建議使用回調。看看這裏：

http://guides.rubyonrails.org/association_basics.html

4.5節有關的關聯回調。您可以對has_many認證關聯進行before_add回調，以便從控制器中刪除該代碼，因爲它變得非常臃腫。

class User < ActiveRecord::Base 
    has_many :authentications, :before_add => :apply_share 

    def apply_share(authentication) 
     #update attributes 
     #save model 
    end 
    end 

Answer 2

您需要設置*_share屬性之後調用#save的User對象。

增加新的項目到has_many集合自動保存收集項目，但不會觸發保存父（belongs_to）操作。