from django.db import models
from natural_key_cache.cache_manager import NaturalKeyCacheManager

class MyModel(models.Model):
    # Define natural keys, this can be ommited if id/pk is the natural key
    natural_keys = (
        'nat_key',
    )
    cache = NaturalKeyCacheManager(natural_keys)
    nat_key = models.CharField(max_length=32, unique=True)

MyModel.cache.get(nat_key='unique_instance')