Updating Operations

In previous recipes, we just performed queries against the database. In this recipe, we will use Spring Data JPA to modify the data of our database.

We will continue with our football sample. In this recipe, we will create operations to manage the trading card albums. A user may have albums, an album has cards, and the card references a player. To complete an album, the user needs to have cards with all players. So, they need to know what cards are missing. Users can buy albums and cards, but they cannot choose the cards. They can have repeated players. Users can trade cards. So, they can exchange all unused cards with another user.

Getting ready

For this recipe, we don’t need additional tools compared to previous recipes. As a starting point of this exercise, we will use the completed version of the previous recipe. If you didn’t complete it, you can find it in the book’s repository at https://github.com/PacktPublishing/Spring-Boot...