Put objects in inserted activties into the db.

lib/pleroma/object.ex

@@ -1,9 +1,16 @@
 defmodule Pleroma.Object do
   use Ecto.Schema
+  alias Pleroma.{Repo, Object}
+  import Ecto.Query
 
   schema "objects" do
     field :data, :map
 
     timestamps()
   end
+
+  def get_by_ap_id(ap_id) do
+    Repo.one(from object in Object,
+      where: fragment("? @> ?", object.data, ^%{id: ap_id}))
+  end
 end