Devise limit one session per user at a time
You can't do it.
- You can control IP addresses of user, so you can prevent presence of user from two IP at a time. ANd you can bind login and IP. You can try to check cities and other geolocation data through IP to block user.
- You can set cookies to control something else.
But none of this will guarantee that only one user uses this login, and that those 105 IP from all over the world doesn't belong to only one unique user, which uses Proxy or whatever.
And the last: you never need this in the Internet.
UPD
However, what I'm asking is about limiting multiple users from using the same account simultaneously which I feel should be possible
So you can store some token, that will contain some encrypted data: IP + secret string + user agent + user browser version + user OS + any other personal info: encrypt(IP + "some secret string" + request.user_agent + ...)
. And then you can set a session or cookie with that token. And with each request you can fetch it: if user is the same? Is he using the same browser and the same browser version from the same OS etc.
Also you can use dynamic tokens: you change token each request, so only one user could use system per session, because each request token will be changed, another user will be logged out as far as his token will be expired.
This gem works well: https://github.com/devise-security/devise-security
Add to Gemfile
gem 'devise-security'
after bundle install
rails generate devise_security:install
Then run
rails g migration AddSessionLimitableToUsers unique_session_id
Edit the migration file
class AddSessionLimitableToUsers < ActiveRecord::Migration
def change
add_column :users, :unique_session_id, :string, limit: 20
end
end
Then run
rake db:migrate
Edit your app/models/user.rb file
class User < ActiveRecord::Base
devise :session_limitable # other devise options
... rest of file ...
end
Done. Now logging in from another browser will kill any previous sessions. The gem actual notifies the user that he is about to kill a current session before logging in.