As of Django 1.11, you can use CITextField, a Postgres-specific Field for case-insensitive text backed by the citext type. from django.db import models from django.contrib.postgres.fields import CITextField class Something(models.Model): foo = CITextField() Django also provides CIEmailField and CICharField, which are case-insensitive versions of EmailField and CharField.
Putting the logic in the controller could be the best answer as you stated, but you could get the after_initialize to work by doing the following: after_initialize :add_product def add_product self.product ||= Product.new end That way, it only sets product if no product exists. It may not be worth the overhead and/or be less clear … Read more
post.new_record?
Most likely you are referring to django’s pre_save signal. You could setup something like this: from django.db.models.signals import pre_save from django.dispatch import receiver from django.template.defaultfilters import slugify @receiver(pre_save) def my_callback(sender, instance, *args, **kwargs): instance.slug = slugify(instance.title) If you dont include the sender argument in the decorator, like @receiver(pre_save, sender=MyModel), the callback will be called for … Read more
Entity Entity means an object that is a single item that the business logic works with, more specifically those which have an identity of some sort. Thus, many people refer to ORM-mapped objects as entities. Some refer to as “entity” to a class an instance of which represents a single row in a database. Some … Read more
Update Django 4.0 Django 4.0 documentation recommends using UniqueConstraint with the constraints option instead of unique_together. Use UniqueConstraint with the constraints option instead. UniqueConstraint provides more functionality than unique_together. unique_together may be deprecated in the future. class Hop(models.Model): migration = models.ForeignKey(‘Migration’) host = models.ForeignKey(User, related_name=”host_set”) class Meta: constraints = [ models.UniqueConstraint( fields=[‘migration’, ‘host’], name=”unique_migration_host_combination” ) … Read more
The blank option is used in the form validation, and the null is used when writing to database. So you might add null=True to that field. EDIT: continue the comment Considering the two steps when saving object: Validator(controlled by blank) Database limitation(controlled by null) For default option, take IntegerField for example, default=5, blank=True, null=False, pass … Read more
No, you didn’t miss a general purpose class. I have a Range type in MiscUtil which you may be interested in – and it certainly makes for simple DateTime manipulation. Referring to Marc’s answer, I can’t remember whether this is a struct or a class – you’d be welcome to change it of course. It’s … Read more
State (and models) are stored in $scope $scope is Angular’s data storage object. It’s analogous to a database. $scope itself is not the model, but you can store models in $scope. Each $scope has a parent $scope, all the way up to $rootScope forming a tree structure that loosely mirrors your DOM. When you call … Read more
The terms are a bit vague I agree. I would use domain to refer to the business area you are dealing with. Like banking or insurance or what not. Then you have domain models. These are the things you deal with in that business domain, like for domain of banking you have accounts, customers, transfers … Read more