pleroma/priv/repo/optional_migrations/rum_indexing/20190510135645_add_fts_index_to_objects_two.exs

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

  def up do
    execute("create extension if not exists rum")

    drop_if_exists(
      index(:objects, ["(to_tsvector('english', data->>'content'))"],
        using: :gin,
        name: :objects_fts
      )
    )

    alter table(:objects) do
      add(:fts_content, :tsvector)
    end

    execute("CREATE FUNCTION objects_fts_update() RETURNS trigger AS $$
    begin
    new.fts_content := to_tsvector(new.data->>'content');
    return new;
    end
    $$ LANGUAGE plpgsql")

    execute(
      "create index if not exists objects_fts on objects using RUM (fts_content rum_tsvector_addon_ops, inserted_at) with (attach = 'inserted_at', to = 'fts_content');"
    )

    execute("CREATE TRIGGER tsvectorupdate BEFORE INSERT OR UPDATE ON objects
    FOR EACH ROW EXECUTE PROCEDURE objects_fts_update()")

    execute("UPDATE objects SET updated_at = NOW()")
  end

  def down do
    execute("drop index if exists objects_fts")
    execute("drop trigger if exists tsvectorupdate on objects")
    execute("drop function if exists objects_fts_update()")

    alter table(:objects) do
      remove(:fts_content, :tsvector)
    end

    create_if_not_exists(
      index(:objects, ["(to_tsvector('english', data->>'content'))"],
        using: :gin,
        name: :objects_fts
      )
    )
  end
end