登陸後轉向使用者通路的網頁

在ASP.NET裡面，通過設定強制登入可以讓沒有登入的使用者首先跳轉到登入頁面，然後可以設定讓使用者登入後自動跳轉到使用者想要浏覽的網頁。同樣，在Rails裡面一樣可以實作，實作過程如下：

A Friendlier Login System

As the code stands now, if an administrator tries to access a restricted

page before they are logged in, they are taken to the login page. When

they then log in, the standard status page is displayed—their original

request is forgotten. If you want, you can change the applicaton to forward

them to their originally-requested page once they log in.

First, in the authorize( ) method, remember the incoming request’s URI in

the session if you need to log the user in.

def authorize

unless User.find_by_id(session[:user_id])

session[:original_uri] = request.request_uri

flash[:notice] = "Please log in"

redirect_to(:controller => "login" , :action => "login" )

end

end

Once we log someone in, we can then check to see if there’s a URI stored

in the session and redirect to it if so.

def login

session[:user_id] = nil

if request.post?

user = User.login(params[:name], params[:password])

if user

session[:user_id] = user.id

redirect_to(session[:original_uri] || { :action => "index" })

else

flash[:notice] = "Invalid user/password combination"

end

end

end