Django/venv/lib/python3.7/site-packages/django/contrib/postgres/functions.py

from django.db.models import DateTimeField, Func, UUIDField


class RandomUUID(Func):
    template = 'GEN_RANDOM_UUID()'
    output_field = UUIDField()


class TransactionNow(Func):
    template = 'CURRENT_TIMESTAMP'
    output_field = DateTimeField()