#27448: GIS distance queries use deprecated ST_distance_sphere
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Reporter: Christian von | Owner: Mjumbe
Roques | Poe
Type: | Status: assigned
Cleanup/optimization |
Component: GIS | Version: master
Severity: Normal | Resolution:
Keywords: GIS distance | Triage Stage: Accepted
deprecated ST_distance_sphere |
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
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Comment (by Christian von Roques):
I've added a test to the test-suite to check the PostGIS version dependent
behaviour.
However, my first concise implementation evaluates `spatial_version` in
`PostGISOperations.__init__`, which in turn evaluates an SQL-query, which
confuses quite a few of Django's tests (e.g.
`backends.tests.PostgreSQLTests.test_nodb_connection`). To appease the
test-suite I modified my implementation to defer evaluation of
`spatial_version` using `@cached_property`, which works, but is quite a
bit larger. — My branch
https://github.com/roques/django/tree/postgis22_deprecated contains both,
the nice and the deferred/lazy implementation.
What is the policy for cases like this?
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Ticket URL: <https://code.djangoproject.com/ticket/27448#comment:8>
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