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changelog:
===============================================================================
:meth:`pymongo.collection.Collection.update_one`,
:meth:`pymongo.collection.Collection.update_many`,
:meth:`pymongo.collection.Collection.delete_one`,
:meth:`pymongo.collection.Collection.delete_many`,
:meth:`pymongo.collection.Collection.aggregate`,
:meth:`pymongo.collection.Collection.find_one_and_delete`,
:meth:`pymongo.collection.Collection.find_one_and_replace`,
:meth:`pymongo.collection.Collection.find_one_and_update`,
and :meth:`pymongo.collection.Collection.find` all support a new keyword argument
let which is a map of parameter names and values. Parameters can then be
accessed as variables in an aggregate expression context.
:meth:`~pymongo.collection.Collection.aggregate` now supports $merge and $out
executing on secondaries on MongoDB >=5.0. aggregate() now always obeys the
collection's :attr:`read_preference` on MongoDB >= 5.0.
Signed-off-by: Xu Huan <xuhuan.fnst@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
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