Release 2.1.0

What's Changed

Added

• PostgreSQL backend support — DataJoint now supports PostgreSQL as an alternative to MySQL. Use dj.config['database.backend'] = 'postgresql' to connect to PostgreSQL databases. (#1338, #1339, #1340)

• Diagram improvements (#1345)

  • New collapse() method for high-level pipeline views
  • Mermaid output format support via output='mermaid'
  • Schema grouping with module labels
  • Direction control (direction='LR' or direction='TB')
  • Default diagram direction changed from TB to LR

• Singleton tables — Support for tables with empty primary keys (#1341)

Changed

• Performance: Lazy-load deepdiff and tqdm in autopopulate for faster imports (#1349)
• Packaging: Switched from setuptools to hatchling for build system (#1358)

Deprecated

• The migrate module shows deprecation warning (#1373)

Fixed

• Allow table class names with underscores (with warning) (#1375)

Documentation

• Converted all docstrings to NumPy style (#1378)

Full Changelog: v2.0.2...v2.1.0