Class 9 Prep Exercises

1. Let's add validation to our edit handlers. If you haven't set up edit functionality in your cheese-mvc app, you can add it by following the steps in class 8 prep exercises.

   In the edit handler that displays the form, you should already be passing in the Cheese object to be edited. This means that we can refactor the form in the edit.html template to use th:object="${cheese}" and then use th:field="*{propertyName}" to help render the inputs. Don't forget to modify the <label> elements to use th:for="propertyName". Add error message elements for each of the properties.

   You'll also want to pass in the list of all CheeseType enum values, as we did in the add.html form from the lesson video. You'll want to pre-select the specific option that is already stored on the given object.

   In the edit handler that processes the form, validate the model and respond appropriately.

2. Add an integer property to Cheese to allow the user to give each cheese a rating. Follow these steps:
   • Add the property to Cheese.java, along with validation annotations to allow the user to enter a value between 1 and 5
   • Add the form input, label, and error message display to templates/cheese/add.html
   • Display the rating in templates/cheese/index.html
   • Add the rating to the edit.html template
   • Test!