Integrating MasteryPersistence into Mastery

Now, it’s time to finish up the integration. First, let’s think about what needs to happen for Mastery to work with our tiny external persistence project. We’ll specify the dependency and modify QuizSession.answer_question to take an extra configurable function that will actually persist a response. Here’s our checklist:

• Configure the project to use a repository.

• Add a persistence function to our external API.

• Wire that persistence function into the Boundary.QuizSession GenServer.

It’s going to go quickly. Let’s do the configuration first.

Configuring Mastery for persistence

The first step of our integration is adding the repository to our configuration. To us, the repository is just an external GenServer dependency.

Adding the repository

We’ll switch over to the mastery directory so we can work on the main body of the project. We’ll go to /config/config.exs to add the repo, like this: