priv/repo/migrations/20170911123607_create_notifications.exs


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

  def change do
    create_if_not_exists table(:notifications) do
      add :user_id, references(:users, on_delete: :delete_all)
      add :activity_id, references(:activities, on_delete: :delete_all)
      add :seen, :boolean, default: false

      timestamps()
    end

    create_if_not_exists index(:notifications, [:user_id])
  end
end