In this chapter, we learned about the presentation layer. We saw how to handle the data taken from the user, how to process form submission, and how to do pre-processing of the form. We also saw server-side form validations and covered the process of displaying the data back to the user. In this chapter, we collected the data from the user but we did not see how to add the data to the persistence layer or how to take data from the persistence layer and then display it to the user.
In the next chapter, we will discuss the persistence layer, using the information about form handling which we just discussed. So let's move on to the exciting world of data persistency!