nsfyn55

/*
Invariant:
String is subclass of Object but in java
List<String> is not a subclass of List<Object>


Covariant
String in scala is a subclass of Object
List[String] is a subclass of List[Object]

Bpless

from django.db import models
from caching.base import CachingMixing, CachingManager, CachingQuerySet

class OurModel(CachingMixin, models.Model):
   
    data = models.IntegerField()

    objects = CachedManager(default_from_cache=True, cache_timeout=1200)

Bpless

from django.db import models
from caching.base import CachingManager, CachingMixin 

class CacheIt(CachingMixin, models.Model):
    
    key_data = models.CharField(max_length=30)
    related_stuff = models.ForeignKey('related.RelatedStuff')
    objects = CachingManager()