Update

lib/nulla/models/actor.ex

@@ -135,10 +135,8 @@ defmodule Nulla.Models.Actor do
     Repo.get_by(__MODULE__, by)
   end
 
-  def get_or_create_actor(actor_json) do
-    ap_id = actor_json["id"]
-
-    case __MODULE__.get_actor(ap_id: ap_id) do
+  def get_or_create_actor(%{"id" => ap_id} = actor_json) when is_binary(ap_id) do
+    case get_actor(ap_id: ap_id) do
       nil ->
         params =
           actor_json
@@ -146,13 +144,21 @@ defmodule Nulla.Models.Actor do
           |> Map.delete("id")
           |> Map.put("domain", URI.parse(ap_id).host)
 
-        case __MODULE__.create_actor(params) do
+        case create_actor(params) do
           {:ok, actor} -> {:ok, actor}
           {:error, changeset} -> {:error, {:actor_creation_failed, changeset}}
         end
 
       actor ->
-        {:ok, actor}
+        updates =
+          actor_json
+          |> Map.delete("id")
+          |> Map.put("domain", URI.parse(ap_id).host)
+
+        case changeset(actor, updates) |> Repo.update() do
+          {:ok, updated_actor} -> {:ok, updated_actor}
+          {:error, changeset} -> {:error, {:actor_update_failed, changeset}}
+        end
     end
   end
 end

lib/nulla/models/relation.ex

@@ -65,20 +65,24 @@ defmodule Nulla.Models.Relation do
     Repo.get_by(__MODULE__, by)
   end
 
-  def get_or_create_relation(local_actor_id, remote_actor_id) do
-    case __MODULE__.get_relation(local_actor_id: local_actor_id, remote_actor_id: remote_actor_id) do
+  def get_or_create_relation(local_actor_id, remote_actor_id, opts \\ []) do
+    case get_relation(local_actor_id: local_actor_id, remote_actor_id: remote_actor_id) do
       nil ->
-        case __MODULE__.create_relation(%{
-               followed_by: true,
-               local_actor_id: local_actor_id,
-               remote_actor_id: remote_actor_id
-             }) do
+        attrs =
+          Keyword.merge([local_actor_id: local_actor_id, remote_actor_id: remote_actor_id], opts)
+
+        case create_relation(attrs) do
           {:ok, relation} -> {:ok, relation}
-          {:error, changeset} -> {:error, {:actor_creation_failed, changeset}}
+          {:error, changeset} -> {:error, {:relation_creation_failed, changeset}}
         end
 
       relation ->
-        {:ok, relation}
+        updates = Enum.into(opts, %{})
+
+        case changeset(relation, updates) |> Repo.update() do
+          {:ok, updated_relation} -> {:ok, updated_relation}
+          {:error, changeset} -> {:error, {:relation_update_failed, changeset}}
+        end
     end
   end
 

lib/nulla_web/controllers/inbox_controller.ex

@@ -107,7 +107,8 @@ defmodule NullaWeb.InboxController do
              actor: local_actor.ap_id,
              object: Jason.encode!(follow_activity)
            }),
-         {:ok, _relation} <- Relation.get_or_create_relation(local_actor.id, remote_actor.id) do
+         {:ok, _relation} <-
+           Relation.get_or_create_relation(local_actor.id, remote_actor.id, followed_by: true) do
       activity = %Activity{accept_activity | object: Jason.decode!(accept_activity.object)}
       body = Jason.encode!(ActivityPub.activity(activity))
       headers = HTTPSignature.make_headers(body, remote_actor_json["inbox"], local_actor)