Read action: Show

- [Instructor] In this movie,…we will learn to implement the show action,…which is the other common read action used for CRUD.…In the last movie, we used index…to return a list of records.…One key difference about show is that…it's going to require an ID,…and that ID must exist in the database.…Otherwise rails would return a record not found error.…We can't view the details of a record…if we can't look it up by ID or if it's not there.…Let's add the link to the show page on the index template.…We'll be sure to add that ID.…In my list of subjects, I already have links for show…but they're just place holders at the moment.…

Let's go into our code…and right here where we have link to, show,…let's add this URL.…Now there are three different ways that we can…write this URL since we've defined…our resourceful route on it.…The first is we could just say subjects…and then slash and then inside here…we could drop in subject.id, right, that would work.…That would generate a URL that had subjects…followed by the ID and that's what we're looking for.…