Better error handling for MastodonApiController.

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -10,6 +10,8 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   import Ecto.Query
   require Logger
 
+  action_fallback(:errors)
+
   def create_app(conn, params) do
     with cs <- App.register_changeset(%App{}, params) |> IO.inspect(),
          {:ok, app} <- Repo.insert(cs) |> IO.inspect() do
@@ -327,27 +329,27 @@ def delete_status(%{assigns: %{user: user}} = conn, %{"id" => id}) do
   end
 
   def reblog_status(%{assigns: %{user: user}} = conn, %{"id" => ap_id_or_id}) do
-    with {:ok, announce, _activity} = CommonAPI.repeat(ap_id_or_id, user) do
+    with {:ok, announce, _activity} <- CommonAPI.repeat(ap_id_or_id, user) do
       render(conn, StatusView, "status.json", %{activity: announce, for: user, as: :activity})
     end
   end
 
   def unreblog_status(%{assigns: %{user: user}} = conn, %{"id" => ap_id_or_id}) do
-    with {:ok, _, _, %{data: %{"id" => id}}} = CommonAPI.unrepeat(ap_id_or_id, user),
+    with {:ok, _, _, %{data: %{"id" => id}}} <- CommonAPI.unrepeat(ap_id_or_id, user),
          %Activity{} = activity <- Activity.get_create_activity_by_object_ap_id(id) do
       render(conn, StatusView, "status.json", %{activity: activity, for: user, as: :activity})
     end
   end
 
   def fav_status(%{assigns: %{user: user}} = conn, %{"id" => ap_id_or_id}) do
-    with {:ok, _fav, %{data: %{"id" => id}}} = CommonAPI.favorite(ap_id_or_id, user),
+    with {:ok, _fav, %{data: %{"id" => id}}} <- CommonAPI.favorite(ap_id_or_id, user),
          %Activity{} = activity <- Activity.get_create_activity_by_object_ap_id(id) do
       render(conn, StatusView, "status.json", %{activity: activity, for: user, as: :activity})
     end
   end
 
   def unfav_status(%{assigns: %{user: user}} = conn, %{"id" => ap_id_or_id}) do
-    with {:ok, _, _, %{data: %{"id" => id}}} = CommonAPI.unfavorite(ap_id_or_id, user),
+    with {:ok, _, _, %{data: %{"id" => id}}} <- CommonAPI.unfavorite(ap_id_or_id, user),
          %Activity{} = activity <- Activity.get_create_activity_by_object_ap_id(id) do
       render(conn, StatusView, "status.json", %{activity: activity, for: user, as: :activity})
     end
@@ -919,4 +921,10 @@ def render_notification(user, %{id: id, activity: activity, inserted_at: created
         nil
     end
   end
+
+  def errors(conn, _) do
+    conn
+    |> put_status(500)
+    |> json("Something went wrong")
+  end
 end

test/web/mastodon_api/mastodon_api_controller_test.exs

@@ -505,6 +505,18 @@ test "favs a status and returns it", %{conn: conn} do
 
       assert to_string(activity.id) == id
     end
+
+    test "returns 500 for a wrong id", %{conn: conn} do
+      user = insert(:user)
+
+      resp =
+        conn
+        |> assign(:user, user)
+        |> post("/api/v1/statuses/1/favourite")
+        |> json_response(500)
+
+      assert resp == "Something went wrong"
+    end
   end
 
   describe "unfavoriting" do