Django 3.2: Custom User Model Throws IntegrityError on Bulk Create with Unique Constraints
I'm currently working on a Django 3.2 application where I've defined a custom user model with unique constraints on both the username and email fields. When trying to perform a bulk create using Django's `bulk_create` method, I run into an `IntegrityError` when attempting to insert users with duplicate usernames or emails, even though my implementation should be handling these cases. Here’s a snippet of my model definition: ```python from django.contrib.auth.models import AbstractUser from django.db import models class CustomUser(AbstractUser): email = models.EmailField(unique=True) ``` I have a list of users that I attempt to create like this: ```python users_to_create = [ CustomUser(username='user1', email='user1@example.com'), CustomUser(username='user2', email='user2@example.com'), CustomUser(username='user1', email='user3@example.com'), # Duplicate username ] CustomUser.objects.bulk_create(users_to_create) ``` When I run this code, I get the following error: ``` IntegrityError: UNIQUE constraint failed: app_customuser.username ``` I expected `bulk_create` to skip the duplicate entries or at least notify me in a more informative way, but it seems to be trying to insert all entries at once. I've also tried wrapping the `bulk_create` call in a try-except block, but that doesn't help much since it still raises the error before reaching my exception handling. What’s the best way to handle this situation? Am I missing something in how `bulk_create` works with unique constraints, or is there a recommended approach to batch inserting users without encountering these errors?