4. Views

Q4.1. In the Sinatra version, each controller action ends with either redirect (which as you can see becomes redirect_to in Rails) to redirect the player to another action, or erb to render a view. Why are there no explicit calls corresponding to erb in the Rails version? (Hint: Based on the code in the app, can you discern the Convention-over-Configuration rule that is at work here?)

Q4.2. In the Sinatra version, we directly coded an HTML form using the <form> tag, whereas in the Rails version we are using a Rails method form_with, even though it would be perfectly legal to use raw HTML <form> tags in Rails. Can you think of a reason Rails might introduce this “level of indirection”?

Q4.3. How are form elements such as text fields and buttons handled in Rails? (Again, raw HTML would be legal, but what’s the motivation behind the way Rails does it?)

Q4.4. In the Sinatra version, the show, win and lose views re-use the code in the new view that offers a button for starting a new game. What Rails mechanism allows those views to be re-used in the Rails version?