Quiz: What is the difference between `null=True` and `blank=True` on a Django Model field?
null=True is database-related (storing NULL values); blank=True is validation-related (allowing empty inputs in forms).
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null=True is database-related (storing NULL values); blank=True is validation-related (allowing empty inputs in forms).
F() expressions reference model field values directly in database queries, preventing race conditions during atomic updates.
The SECRET_KEY provides salt for cryptographic signatures; exposing it compromises session security and forgery protections.
Context Processors run on every request, populating global template context variables (e.g. `request`, `user`, `messages`).
get_object_or_404() simplifies view logic by catching missing model exceptions and returning a standard 404 response.
collectstatic aggregates static assets (CSS, JS, images) into `STATIC_ROOT` for production web servers (e.g. Nginx) to serve.
Defining clean_ () on a Form class allows specialized validation and transformation of individual field inputs.
models.CASCADE maintains referential integrity by cascading parent record deletions down to all dependent child records.