Query/Filter revisions

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faw...@gmail.com

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Dec 3, 2017, 10:00:55 AM12/3/17
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Say I have a model Foo with field bar and 50 instances created (with versioning enabled)

How can apply query filter on the versions?

Something along the lines of

Foo.objects.filter(versions__bar__in=('x', 'y', 'z'))

or

FooVersions.objects.filter(bar__in=('x', 'y', 'z'))

Thanks.

Dave Hall

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Dec 5, 2017, 10:31:11 AM12/5/17
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You can't filter versions by any fields on the version-controlled model. The model is stored as JSON using the django serialization framework, so querying on it is impossible.

...well, not quite true. There has been some talk of standardizing the django-reversion serialization format to JSON (dropping support for other formats), which would allow postgres only filtering of revision data. The amount of effort to port existing revision databases over, however, and a general desire to continue supporting different serialization formats, means it's not progressed.

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