Fix creating an mz activity when updating an event with some subfields

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

lib/mobilizon/events/event.ex

@@ -64,7 +64,8 @@ defmodule Mobilizon.Events.Event do
           tags: [Tag.t()],
           participants: [Actor.t()],
           contacts: [Actor.t()],
-          language: String.t()
+          language: String.t(),
+          metadata: [EventMetadata.t()]
         }
 
   @update_required_attrs [:title, :begins_on, :organizer_actor_id]

lib/mobilizon/events/events.ex

@@ -19,7 +19,6 @@ defmodule Mobilizon.Events do
 
   alias Mobilizon.Events.{
     Event,
-    EventOptions,
     EventParticipantStats,
     FeedToken,
     Participant,
@@ -329,37 +328,28 @@ defmodule Mobilizon.Events do
   defp build_changes(changes) do
     changes
     |> Map.take(Event.__schema__(:fields))
-    |> maybe_add_address(changes)
-    |> maybe_add_options(changes)
+    |> maybe_add_field(:physical_address)
+    |> maybe_add_field(:options)
+    |> maybe_add_field(:metadata)
   end
 
-  @spec maybe_add_address(map(), map()) :: map()
-  defp maybe_add_address(changes, %{physical_address: %Ecto.Changeset{} = changeset}),
-    do:
-      Map.put(
-        changes,
-        :physical_address,
-        changeset
-        |> Ecto.Changeset.apply_changes()
-        |> Map.from_struct()
-        |> Map.take(Address.__schema__(:fields))
-      )
+  @spec maybe_add_field(map(), atom()) :: map()
+  defp maybe_add_field(changes, field) do
+    case Map.get(changes, field) do
+      %Ecto.Changeset{} = changeset ->
+        Map.put(
+          changes,
+          field,
+          changeset
+          |> Ecto.Changeset.apply_changes()
+          |> Map.from_struct()
+          |> Map.take(Address.__schema__(:fields))
+        )
 
-  defp maybe_add_address(changes, _), do: Map.drop(changes, [:physical_address])
-
-  @spec maybe_add_options(map(), map()) :: map()
-  defp maybe_add_options(changes, %{options: %Ecto.Changeset{} = changeset}),
-    do:
-      Map.put(
-        changes,
-        :options,
-        changeset
-        |> Ecto.Changeset.apply_changes()
-        |> Map.from_struct()
-        |> Map.take(EventOptions.__schema__(:fields))
-      )
-
-  defp maybe_add_options(changes, _), do: Map.drop(changes, [:options])
+      _ ->
+        Map.drop(changes, [field])
+    end
+  end
 
   @doc """
   Deletes an event.