Deleting a document unnecessarily scans all annotations #2889

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opened 2016-02-26 11:26:35 +00:00 by wjt · 3 comments

wjt commented

2016-02-26 11:26:35 +00:00

There is a pre_delete handler for Document which deletes the document's file. FileField.delete() will, by default, save() the model instance it is attached to. This is pointless if we're in the process of deleting the Document – and since Document.save() calls Document.update_matches(), this scans all annotations every time a document is deleted.

There is a `pre_delete` handler for `Document` which deletes the document's file. `FileField.delete()` will, by default, `save()` the model instance it is attached to. This is pointless if we're in the process of deleting the `Document` – and since `Document.save()` calls `Document.update_matches()`, this scans all annotations every time a document is deleted.

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backend

label 2016-02-26 11:26:35 +00:00

wjt added this to the 14.04 milestone 2016-02-26 11:26:35 +00:00

j was assigned by wjt

2016-02-26 11:26:35 +00:00

wjt added the

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labels 2016-02-26 11:26:35 +00:00

wjt commented

2016-02-26 11:30:02 +00:00

Author

3 commits on https://gitlab.com/wjt/pandora.git branch 2889-dont-save-on-delete

Diff: https://gitlab.com/wjt/pandora/compare/master...2889-dont-save-on-delete

3 commits on <https://gitlab.com/wjt/pandora.git> branch 2889-dont-save-on-delete Diff: <https://gitlab.com/wjt/pandora/compare/master...2889-dont-save-on-delete>

wjt commented

2016-02-26 11:47:27 +00:00

Author

In this brave new Django 1.9 future, these pre_delete hooks might want to use on_commit to defer deleting the files until the transaction is committed: https://docs.djangoproject.com/en/1.9/topics/db/transactions/#performing-actions-after-commit

In this brave new Django 1.9 future, these `pre_delete` hooks might want to use `on_commit` to defer deleting the files until the transaction is committed: <https://docs.djangoproject.com/en/1.9/topics/db/transactions/#performing-actions-after-commit>

j commented

2016-03-03 12:41:39 +00:00

Owner

In 6e0049a/pandora:

#!CommitTicketReference repository="pandora" revision="6e0049a20c8476dde978227a8c49e42bcca2d1d3"
Don't save Document in pre_delete handler (fixes #2889)

FileField.delete() will, by default, save() the model instance it is
attached to. This is pointless if we're in the process of deleting the
Document -- and since Document.save() calls Document.update_matches(),
this scans all annotations every time a document is deleted.

In [6e0049a/pandora](https://code.0x2620.org/0x2620/pandora/commit/6e0049a20c8476dde978227a8c49e42bcca2d1d3): ``` #!CommitTicketReference repository="pandora" revision="6e0049a20c8476dde978227a8c49e42bcca2d1d3" Don't save Document in pre_delete handler (fixes #2889) FileField.delete() will, by default, save() the model instance it is attached to. This is pointless if we're in the process of deleting the Document -- and since Document.save() calls Document.update_matches(), this scans all annotations every time a document is deleted. ```