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Showing posts from May, 2011

Django Models Mixins

One thing I've been experimenting with is model Mixins.  For example, the aim is to create small abstract classes that are each focused around a particular function.  These abstract classes can then be added to arbitrary models to apply those functions to models as desired.

For example, say I define a RatingsFields abstract class and a TrackingFields abstract class.  These abstract classes can be mixed into any other model that we wish to add rating or tracking functionality to.

core/mixins.py
from djangoratings.fields import RatingField # 3rd party moduleclass RatingFields(models.Model): rating = RatingField(range=5) # 5 possible rating values, 1-5 class Meta: abstract = Trueclass TrackingFields(models.Model): deleted_on = models.DateTimeField(blank=True, null=True) created = models.DateTimeField(auto_now_add=True) modified = models.DateTimeField(auto_now=True) class Meta: abstract = True
Since we applied the abstract classes to the Post …