Deleting Cookies from a Controller - ruby-on-rails

Question

I set some cookie values in my form using jQuery. I can read them just fine in my Rails controller via the cookies method. When I call cookies.delete(:my_key), they appear to be gone when I call cookies again. But when I reload the page, the cookies are back again.
Is there a way to delete the cookies for good from inside my controller?
EDIT
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?
Set-Cookie: my_key=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT

Answer 1

For example, your cookie look like this
cookies[:foo] = {:value => 'bar', :domain => '.text.com'}
As you tried this one => cookies.delete :foo
The logs will say => Cookie set: foo=; path=/; expires=Thu, 01 Jan 1970 00:00:00 GMT
Notice that the domain is missing. Tried this way
cookies.delete :foo, :domain =>
'.text.com'
Function = >
# 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

Answer 2

According to the rails api, there is now a delete method, so if you have not set the domain use
cookies.delete :my_key
and if you have set the domain
cookies.delete :my_key, domain: 'mydomain.com'

Answer 3

We can delete the cookies by passing name and options to delete method as follows:
Syntax: delete(name, options = {})
Description: Removes the cookie on the client machine by setting the value to an empty string and the expiration date in the past. Like []=, you can pass in an options hash to delete cookies with extra data such as a :path.
Example:
cookies.delete('JWT', {
value: "",
expires: 1.day.ago,
path: '/api'
})