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[3.1.x] Fixed #32388 -- Clarified QuerySet.bulk_update() caveat about duplicates for multiple batches. 

Backport of 241da3f06e from master
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Timothy McCurrach 2021-01-27 11:25:31 +00:00 committed by Mariusz Felisiak
parent fa203f1759
commit b920945d02
1 changed files with 2 additions and 1 deletions
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docs/ref/models/querysets.txt
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@ -2181,7 +2181,8 @@ them, but it has a few caveats:
``batch_size``.
* Updating fields defined on multi-table inheritance ancestors will incur an
extra query per ancestor.
* If ``objs`` contains duplicates, only the first one is updated.
* When an individual batch contains duplicates, only the first instance in that
batch will result in an update.
The ``batch_size`` parameter controls how many objects are saved in a single
query. The default is to update all objects in one batch, except for SQLite