akkoma/priv/repo/migrations/20180829182612_activities_add_to_cc_indices.exs

defmodule Pleroma.Repo.Migrations.ActivitiesAddToCcIndices do
  use Ecto.Migration

  def change do
    create_if_not_exists(
      index(:activities, ["(data->'to')"], name: :activities_to_index, using: :gin)
    )

    create_if_not_exists(
      index(:activities, ["(data->'cc')"], name: :activities_cc_index, using: :gin)
    )
  end
end