I have some simple models, Profile, Certifier and Designer, the two latter inheriting from Profile (multi table inheritance). In Designer there’s a foreign key to Certifier. class Profile(models.Mo...

I'm looping through a list of objects and saving. I need the newly generated id or pointer id right after the save but it is None. Here is my code: for category in category_list: saved_categor...

In Django, if you have models that use multi-table inheritance, and you define a receiver for a post_save signal on the parent class, does that receiver function get called when an instance of the ...

Many experienced developers recommend against using Django multi-table inheritance because of its poor performance: Django gotcha: concrete inheritance by Jacob Kaplan-Moss, a core contributor ...

The Django Docs uses this example to demonstrate multi-table inheritance: from django.db import models class Place(models.Model): name = models.CharField(max_length=50) address = models.CharFie...

In the project i'm currently developing under rails 4.0.0beta1, i had the need for a user based authentication in which each user could be linked to an entity. I'm kinda new to rails and had some t...