Tech

I opened a Django feature proposal to add AddConstraintConcurrently and RemoveConstraintConcurrently — a pair of opt-in contrib.postgres operations for creating and dropping unique indexes backed by UniqueConstraint without locking database writes.

How to safely migrate a Django unique constraint to be case-insensitive in production, handling duplicates and avoiding database locks

WeasyPrint enables PDF generation using the familiar HTML and CSS, but global pagination and layout can lead to severe performance degradation for large, structured documents. Learn why this happens and how restructuring reduced PDF build time by 94%.