Programming Phoenix 1.4

Defining the User Schema and Migration

At its core, Ecto lets you specify a struct that ties individual fields to the fields in database tables through a DSL. Let’s use that now. To define our schema, let’s replace our bare user struct in lib/rumbl/accounts/user.ex with the following:

ecto/listings/rumbl/lib/rumbl/accounts/user.change1.ex

defmodule Rumbl.Accounts.User do
  use Ecto.Schema
  import Ecto.Changeset

  schema "users" do
    field :name, :string
    field :username, :string

    timestamps()
  end
end

This DSL is built with Elixir macros. The schema and field macros let us specify both the underlying database table and the Elixir struct at the same time. Each field corresponds to both a field in the database ...