How to fill GraphQL ENUM from Django QuerySet?

Question

In my graphql API for Revenue field use Currency enum from constant.

from graphene import Enum


CurrencyEnum = Enum('Currency', CURRENCY_CHOICES)

class RevenueMetrics:
    revenue = graphene.Float(description='Revenue', currency=CurrencyEnum(required=True))

But now CURRENCY_CHOICES constant has moved to DB (Currency table). There are good reasons for this (not related to graphql).

I can't figure out how to create CurrencyEnum class with dynamic filling from QuerySet of Currency table. Have an up-to-date set of Currencies.(I suppose that there is another question in the restructuring of the scheme).

graphene==2.1.8
graphene-django==2.13.0

I tried like this:

def dcm():
    return Enum('Currency', tuple((c, c) for c in Currency.objects.values_list('code', flat=True)))

revenue = graphene.Float(description='Revenue', currency=dcm()(required=True))

But it still requires a schema regeneration.