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Refs #30656 -- Reorganized bulk methods in the database optimization docs.

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daniel a rios 2019-07-26 15:11:48 +02:00 committed by Mariusz Felisiak
parent 3c6d32e0b2
commit fe33fdc049
1 changed files with 14 additions and 4 deletions
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18
docs/topics/db/optimization.txt
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@ -341,8 +341,13 @@ it on a ``QuerySet`` by calling
Adding an index to your database may help to improve ordering performance.
Insert in bulk
==============
Use bulk methods
================
Use bulk methods to reduce the number of SQL statements.
Create in bulk
--------------
When creating objects, where possible, use the
:meth:`~django.db.models.query.QuerySet.bulk_create()` method to reduce the
@ -362,8 +367,13 @@ Note that there are a number of :meth:`caveats to this method
<django.db.models.query.QuerySet.bulk_create>`, so make sure it's appropriate
for your use case.
This also applies to :class:`ManyToManyFields
<django.db.models.ManyToManyField>`, so doing::
Insert in bulk
--------------
When inserting objects into :class:`ManyToManyFields
<django.db.models.ManyToManyField>`, use
:meth:`~django.db.models.fields.related.RelatedManager.add` with multiple
objects to reduce the number of SQL queries. For example::
my_band.members.add(me, my_friend)