akkoma/priv/repo/migrations/20191008132427_drop_users_following.exs

# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only

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

  # had to disable these to be able to restore `following` index concurrently
  # https://hexdocs.pm/ecto_sql/Ecto.Migration.html#index/3-adding-dropping-indexes-concurrently
  @disable_ddl_transaction true
  @disable_migration_lock true

  def change do
    drop(index(:users, [:following], concurrently: true, using: :gin))

    alter table(:users) do
      remove(:following, {:array, :string}, default: [])
    end
  end
end