How do I implement logout functionality with OmniAuth in Rails?

How do I implement logout functionality with OmniAuth in Rails?

To implement logout functionality with OmniAuth in Rails, you need to clear the session and redirect the user. Here's a basic example:

1. In your controller, create a logout action:

   def logout
     reset_session
     redirect_to root_path, notice: 'Successfully logged out.'
   end
   

2. Add a route for the logout action in your routes file:

   delete 'logout', to: 'sessions#logout'
   

3. Create a logout link in your view:

   <%= link_to 'Logout', logout_path, method: :delete %>
   

This will clear the session and log the user out.

What if I want to log out from a specific provider?

If you want to log out from a specific provider, you can use the provider's logout URL. For example, if you're using Google, you can redirect the user to the Google logout URL after resetting the session. Here's how you can do it:

def logout
  reset_session
  redirect_to 'https://accounts.google.com/Logout'
end

Can I add a confirmation before logging out?

Yes, you can add a confirmation dialog using JavaScript. Modify your logout link like this:

<%= link_to 'Logout', logout_path, method: :delete, data: { confirm: 'Are you sure you want to log out?' } %>

What if I want to log out and redirect to a specific page?

You can modify the redirect path in your logout action. For example:

def logout
  reset_session
  redirect_to goodbye_path, notice: 'Successfully logged out.'
end