bones73k/priv/repo/migrations/20200914162043_create_properties.exs

defmodule Bones73k.Repo.Migrations.CreateProperties do
  use Ecto.Migration

  def change do
    create table(:properties) do
      add(:name, :string)
      add(:price, :decimal)
      add(:description, :text)
      add(:user_id, references(:users, on_delete: :nothing))

      timestamps()
    end

    create(index(:properties, [:user_id]))
  end
end