Functional Programming: A PragPub Anthology

Creating Structs

We had a pleasant surprise when we built this API. We’d accidentally built in support for structs! Since an Elixir struct is just a map with the extra __struct__ key, just adding the key __struct__: User to the existing User record would create users that satisfy a struct called User like this:

~~~
  register :user,
    __struct__: User,
    first_name: Faker.Name.first_name,
    last_name: Faker.Name.last_name,
    email: Sequence.next(:email, &"test#{&1}@example.com")
~~~