Ensure local users have collection addresses

lib/pleroma/user.ex

@@ -407,6 +407,12 @@ defmodule Pleroma.User do
   def generate_ap_id(%{nickname: nickname}) when nickname != nil,
     do: "#{Endpoint.url()}/users/#{nickname}"
 
+  @spec generate_ap_inbox(%{ap_id: String.t()}) :: String.t()
+  def generate_ap_inbox(%{ap_id: ap_id}) when ap_id != nil, do: "#{ap_id}/inbox"
+
+  @spec generate_ap_outbox(%{ap_id: String.t()}) :: String.t()
+  def generate_ap_outbox(%{ap_id: ap_id}) when ap_id != nil, do: "#{ap_id}/outbox"
+
   @spec generate_ap_followers(%{ap_id: String.t()}) :: String.t()
   def generate_ap_followers(%{ap_id: ap_id}) when ap_id != nil, do: "#{ap_id}/followers"
 
@@ -789,6 +795,7 @@ defmodule Pleroma.User do
     |> validate_format(:nickname, local_nickname_regex())
     |> put_ap_id()
     |> unique_constraint(:ap_id)
+    |> put_in_and_outbox()
     |> put_following_and_follower_and_featured_address()
     |> put_private_key()
   end
@@ -851,6 +858,7 @@ defmodule Pleroma.User do
     |> put_password_hash
     |> put_ap_id()
     |> unique_constraint(:ap_id)
+    |> put_in_and_outbox()
     |> put_following_and_follower_and_featured_address()
     |> put_private_key()
   end
@@ -871,6 +879,17 @@ defmodule Pleroma.User do
 
   defp put_ap_id(%{valid?: false} = changeset), do: changeset
 
+  defp put_in_and_outbox(%{valid?: true, changes: initdata} = changeset) do
+    inbox = generate_ap_inbox(initdata)
+    outbox = generate_ap_inbox(initdata)
+
+    changeset
+    |> put_change(:inbox, inbox)
+    |> put_change(:outbox, outbox)
+  end
+
+  defp put_in_and_outbox(%{valid?: false} = changeset), do: changeset
+
   defp put_following_and_follower_and_featured_address(
          %{valid?: true, changes: initdata} = changeset
        ) do

priv/repo/migrations/20260702000200_ensure_local_users_have_ap_collections.exs

@@ -0,0 +1,32 @@
+defmodule Pleroma.Repo.Migrations.EnsureLocalUsersHaveAPCollections do
+  use Ecto.Migration
+
+  import Ecto.Query
+
+  defp update_for(target, suffix) do
+    from(
+      u in Pleroma.User,
+      where: u.local and is_nil(field(u, ^target)),
+      update: [set: [{^target, fragment("? || ?::text", u.ap_id, ^suffix)}]]
+    )
+    |> Pleroma.Repo.update_all([])
+  end
+
+  def up() do
+    # Suffixes are copied from contemporary generate_* functions in User module
+
+    # note: up until now local users _always_ had a nil inbox and outbox
+    update_for(:inbox, "/inbox")
+    update_for(:outbox, "/outbox")
+
+    update_for(:featured_address, "/collections/featured")
+
+    update_for(:follower_address, "/followers")
+    update_for(:following_address, "/following")
+  end
+
+  def down() do
+    # no need to revert
+    :ok
+  end
+end

test/support/factory.ex

@@ -91,7 +91,8 @@ defmodule Pleroma.Factory do
 
         %{
           ap_id: ap_id,
-          inbox: User.generate_ap_id(user) <> "/inbox",
+          inbox: User.generate_ap_inbox(user),
+          outbox: User.generate_ap_outbox(user),
           follower_address: User.generate_ap_followers(user),
           following_address: User.generate_ap_following(user),
           featured_address: User.generate_ap_featured_collection(user)