Programming Phoenix

Wrapping Up

In this chapter, we generated a Video resource with a relationship to User and made changes to the generated code, learning a lot along the way:

• We converted a private plug into a public function and shared it with our controllers and routers.

• You learned how to migrate and roll back changes to the database.

• We defined relationships between User and Video schemas and used functions from Ecto to build and retrieve associated data.

• You learned that Ecto uses strictly explicit semantics to determine if a relationship is loaded or not.

The next chapter will take everything up a notch by exploring Ecto queries and leveraging the database constraints. When we’re done, you’ll be able to ensure data uniqueness and use the database to maintain ...