akkoma/priv/repo/migrations/20190801154554_create_conversation_participation_recipient_ships.exs

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defmodule Pleroma.Repo.Migrations.CreateConversationParticipationRecipientShips do
use Ecto.Migration
def change do
create_if_not_exists table(:conversation_participation_recipient_ships) do
add(:user_id, references(:users, type: :uuid, on_delete: :delete_all))
add(:participation_id, references(:conversation_participations, on_delete: :delete_all))
end
create_if_not_exists index(:conversation_participation_recipient_ships, [:user_id])
create_if_not_exists index(:conversation_participation_recipient_ships, [:participation_id])
end
end