躺在沙灘上的小豬

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Post and Get

在《Agile Web Development with Rails》中看到如下的一句話

???? If it has no associated data, it will come in as a GET request. If instead it contains form data, we’ll see a POST. Inside a Rails controller, the request information is available in the attribute request. We can check the request type using the methods get?( ) and post?( ).

也就是說當(dāng)沒有數(shù)據(jù)的時(shí)候，是get,而有數(shù)據(jù)的時(shí)候則是post.

例如我們在用戶登錄的時(shí)候，首先轉(zhuǎn)到登錄界面，這個(gè)時(shí)候當(dāng)然還沒有數(shù)據(jù)，那么

request.get?

為true,輸入相應(yīng)的數(shù)據(jù)，提交為false,這樣我們可以通過一個(gè)action來控制流程
?

??def?login

??????if?request.get?

??????????session[:user_id]=nil

??????????@user?=?User.new

??????else

??????????@user?=?User.new(params[:user])

??????????logged_in_user?=?@user.try_to_login

??????????if?logged_in_user

??????????????session[:user_id]=logged_in_user.id

??????????????redirect_to?:action=>'index'

??????????else

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

??????????end

??????end

??end?

posted on 2006-05-16 10:08 martin xus 閱讀(267) 評論(0) 編輯收藏

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Post and Get

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