from django.db import models

class EnumValueManager(models.Manager):
    def get_by_natural_key(self, value):
        return self.get(value=value)


class EnumGroupManager(models.Manager):
    def get_by_natural_key(self, name):
        return self.get(name=name)


class AttributeManager(models.Manager):
    def get_by_natural_key(self, name, slug):
        return self.get(name=name, slug=slug)