Ruby-on-rails 从控制器中删除 Cookie

Deleting Cookies from a Controller

提问by Dex

I set some cookie values in my form using jQuery. I can read them just fine in my Rails controller via the cookiesmethod. When I call cookies.delete(:my_key), they appear to be gone when I call cookiesagain. But when I reload the page, the cookies are back again.

我使用 jQuery 在我的表单中设置了一些 cookie 值。我可以通过cookies方法在我的 Rails 控制器中很好地读取它们。当我打电话时cookies.delete(:my_key)，当我cookies再次打电话时，它们似乎消失了。但是当我重新加载页面时，cookie 又回来了。

Is there a way to delete the cookies for good from inside my controller?

有没有办法从我的控制器内部永久删除 cookie？

EDIT

编辑

This is very strange since I'm looking at the response headers and they seem to be deleting the cookie. Maybe it's because it is a 302 request?

这很奇怪，因为我正在查看响应头，他们似乎正在删除 cookie。也许是因为它是一个 302 请求？

Set-Cookie: my_key=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT

回答by Rubyist

For example, your cookie look like this

例如，您的 cookie 看起来像这样

cookies[:foo] = {:value => 'bar', :domain => '.text.com'}

As you tried this one => cookies.delete :foo

当你尝试这个时 => cookies.delete :foo

The logs will say => Cookie set: foo=; path=/; expires=Thu, 01 Jan 1970 00:00:00 GMT

日志会说 => Cookie set: foo=; path=/; expires=Thu, 01 Jan 1970 00:00:00 GMT

Notice that the domain is missing. Tried this way

请注意，缺少域。试过这种方法

cookies.delete :foo, :domain => '.text.com'

cookies.delete :foo, :domain => '.text.com'

Function = >

功能 = >

# Removes the cookie on the client machine by setting the value to an empty string
# and setting its expiration date into the past.  Like []=, you can pass in an options
# hash to delete cookies with extra data such as a +path+.
def delete(name, options = {})
  options.stringify_keys!
  set_cookie(options.merge("name" => name.to_s, "value" => "", "expires" => Time.at(0)))
end

回答by Obromios

According to the rails api, there is now a delete method, so if you have not set the domain use

根据rails api，现在有一个删除方法，所以如果你没有设置域使用

cookies.delete :my_key

and if you have set the domain

如果你已经设置了域

cookies.delete :my_key, domain: 'mydomain.com'