Django Model Validation scenarios for Unique Fields When Using Bulk Create
I'm sure I'm missing something obvious here, but I'm working on a project and hit a roadblock... I'm experiencing an scenario with unique field validation in Django when using the `bulk_create` method. I have a model `Product` with a unique field `sku`. When I try to bulk create multiple instances of this model, I expect Django to check for existing `sku` values and raise an appropriate behavior if there's a conflict. However, I'm finding that the validation only occurs after the objects are saved to the database, leading to a `django.db.utils.IntegrityError` for any duplicate `sku` values. My current implementation looks like this: ```python from myapp.models import Product products_to_create = [ Product(sku='ABC123', name='Product 1'), Product(sku='XYZ789', name='Product 2'), Product(sku='ABC123', name='Product 3') # This will cause a conflict ] # Attempting to bulk create try: Product.objects.bulk_create(products_to_create) except IntegrityError as e: print(f'behavior occurred: {e}') ``` This results in the following behavior: ``` IntegrityError: UNIQUE constraint failed: myapp_product.sku ``` I've tried adding validation manually before the bulk create by checking existing `sku` values, but it feels clunky. I also considered using `update_or_create`, but that's not efficient for a large number of records. Is there a better way to handle this situation while maintaining performance? Is there a best practice for dealing with unique constraints in bulk operations within Django? My development environment is Ubuntu. What am I doing wrong? I'm working in a Debian environment. What's the correct way to implement this? Am I approaching this the right way?