Basic Challenge: Sign-in Status

Problem statement

In the previous lesson, you may have come across an error in the line for index.html.erb:

<% if current_user.liked? link %>

This error occurs in case no user is signed-in. The current_user call will return nil, so you cannot make a valid call to .liked?.

Run the application, sign-in, and create a new link. Once the link is created sign-out, you will receive an error.

Your challenge is to fix the error by checking whether a user is signed-in or not.

In case no user is signed-in, the like button will not be displayed.

Implementation