Full support (CI) of Python 3.10 and MongoDB v5.

• Add support for partialFilterExpression to create_index (#784)
• Handle $ in update operations when it is the last field. (#787)
• Drop system collections on drop_database calls. (#788)
• Add support for "number" alias in $type (#757)
• Allow system vars expressions to generate arrays (#619)
• Handle $arrayElementAt applied to $filter
• $pushall $addToSet dollar operand support (#786)
• Fix handling non existent fields and other errors in arithmetic operators and grouping. (#502)
• Add support for allow_disk_use (#780)
• Use class instead of function in patch (#768)
• Make reading documents more thread safe. #694 (#695)
• Patch gridfs without using isinstance. (#761)
• Fix behavior for $type filter on arrays (#756)
• Fix behavior for $type filter on numeric types (#755)
• Make find(projection=...) return copies of the values (#753)
• Add $not as a logic operator (#716)
• Implement $map operator (#738)
• Fix aggregation failing if index does not exists, added test (#646)
• Sublist candidate handling update (#676)
• Make distinct() work with arrays of dicts (#751)
• Add let and array_filters args for update_ methods
• Create the list_collections method on Database
• Keep a client's server info consistent
• Get the server info from an env var
• Keep the server_info value in sync with the CI

Fix deployment authentication.

This release mainly brings support for pymongo v4. It is still compatible with pymongo v3 and despite the major version, in most cases it should be an easy upgrade.

Breaking Changes

• Drop support for Python 2
• If no pymongo is installed at runtime, uses pymongo v4 interface

• Add default and options to get_default_database() (#693)
• Bump the version of hacking, setting our flake8 config
• Support read_concern in database.get_collection() (#708)
• Support $toLong operator (#705)
• Fix for {$size: 1} queries on non-existent fields (#711)
• Parse `index` of $arrayElemAt. Fix #607 (#701)
• Implement the $let operator. (#698)
• Implement the $expr operator. (#538)
• Fix some bad indenting
• Fail properly on computing the $size of a missing array. (#697)
• Fix SyntaxWarning about using "is not" with literals
• Add support for mergeObjects operator (#689)
• fix: use group operators in addFields (#690)

• Fix type stubs for patch and test it to prevent regressions
• Fix missing fields management in the graphLookup stage
• Allow dot'ted field in connectFrom of $graphLookup aggregation pipeline (#686)

3.22.0

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3.21.0

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3.20.0

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3.19.0

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