Programming Ecto

Creating a Form with an Association

Now let’s tackle a more complex case: creating a form with associations. To make it even more interesting, we’ll use an embedded schema representing the user’s address. If you need to refresh your memory on schemas, associations or embeds, you might want to flip back to Chapter 3, ​Connecting Your Tables to Elixir Structs with Schemas​ before proceeding.

First, create an embedded schema for the user’s address, along with a changeset function:

priv/examples/phoenix_forms_03.exs

defmodule MyApp.Address do
  import Ecto.Changeset
  use Ecto.Schema

  embedded_schema do
    field :street, :string
    field :city, :string
  end

  def changeset(address, ...