Allow multiple identities (accounts actors) for one user.

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

priv/repo/migrations/20180709154152_allow_multiple_accounts_for_user.exs

@@ -0,0 +1,23 @@
+defmodule Eventos.Repo.Migrations.AllowMultipleAccountsForUser do
+  use Ecto.Migration
+
+  def up do
+    alter table(:actors) do
+      add :user_id, references(:users, on_delete: :delete_all), null: true
+    end
+
+    alter table(:users) do
+      remove :actor_id
+    end
+  end
+
+  def down do
+    alter table(:users) do
+      add :actor_id, references(:actors, on_delete: :delete_all), null: false
+    end
+
+    alter table(:actors) do
+      remove :user_id
+    end
+  end
+end