我想允许特定用户使用facebook登录系统登录

Question

我正在建立我大学的在线社区。

我想允许前往＆＃34; ABC大学＆＃34;使用＆＃34; facebook-omniauth＆＃34;登录。

但我不知道如何写这个逻辑...... 你知道怎么做这个逻辑吗？

会话控制器

def create
    auth = request.env["omniauth.auth"]
    session[:omniauth] = auth
    user = User.sign_in_from_facebook(auth) 
    session[:user_id] = user.id
    redirect_to root_url, notice: "Signed In"
end

用户模型

def self.sign_in_from_facebook(auth)
    find_by(provider: auth['provider'], uid: auth['uid'] ) || create_user_from_facebook(auth)
end

def self.create_user_from_facebook(auth)
    create(

    avatar: process_uri(auth['info']['image'] + "?width=9999"),
    email: auth['info']['email'],
    provider: auth['provider'],
    uid: auth['uid'],
    name: auth['info']['name'],
    token: auth['credentials']['token'],
    gender: auth['extra']['raw_info']['gender'],
    education: auth['extra']['raw_info']['education'],
    bio: auth['extra']['raw_info']['bio']


    )
end