Django MongoDB Backend 6.0.4 is now available

Product & Driver Announcements
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We’re happy to announce the release of Django MongoDB Backend 6.0.4. This release adds a number of new query features, several bug fixes, and a few backwards-incompatible changes to be aware of. Here are the highlights.

New features

  • Window functions are now supported.
  • StringAgg aggregate is now supported (it was unsupported in 6.0.0).
  • New database functions: ExtractQuarter, LPad, RPad, Repeat, Reverse, Right, Sign, plus MD5 and SHA256 (which require MongoDB 8.3+).
  • Timezone support: fixed-offset tzinfo in the Extract functions, and the tzinfo parameter of TruncDate and TruncTime.
  • Pattern-matching lookups on UUIDField (iexact, startswith, istartswith, endswith, iendswith, contains, icontains, regex, iregex).
  • FilteredRelation is now supported.
  • Vector search: a new indexing_methods argument on VectorSearchIndex lets you choose "hnsw" (server default) or "flat" per vector field.
  • Django’s warning for import-time queries is now supported.

Bug fixes

  • Sum now returns None (instead of 0) when no rows match, matching SQL semantics.
  • Fixed pattern-matching lookups on non-string fields.
  • atomic() no longer silences exceptions raised on commit.
  • Fixed several crashes with EmbeddedModelField / EmbeddedModelArrayField form submission and validation-error rendering, and with polymorphic embedded models.
  • makemigrations now correctly orders CreateModel operations for embedded models.
  • Aggregation queries no longer generate redundant accumulators in the $group stage.
  • Added debug logging for QuerySet.explain().

Backwards-incompatible changes

A few changes may require action:

  1. Embedded models are now unmanaged (managed = False). Running makemigrations will add an AlterModelOptions operation for existing embedded models.
  2. You must add 'django_mongodb_backend' to INSTALLED_APPS to generate migration operations for embedded models.
  3. Unique constraints are now created so the query planner can avoid collection scans (for all built-in fields except ArrayField, BinaryField, and JSONField). To benefit, drop and recreate constraints created with older versions.

See the full release notes for details and migration guidance: https://django-mongodb-backend.readthedocs.io/en/latest/releases/6.0.x.html

Install or upgrade with pip install --upgrade django-mongodb-backend==6.0.4.

Found a bug or have a feature request? Please file an issue in the Python Integrations (INTPYTHON) project on our public Jira: https://jira.mongodb.org/projects/INTPYTHON/

As always, feedback and bug reports are welcome. Happy building!

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