Opened 11 years ago
Closed 11 years ago
#22205 closed Uncategorized (wontfix)
Feature request: Warn about aggregating over possibly incompatible types
| Reported by: | Owned by: | nobody | |
|---|---|---|---|
| Component: | Database layer (models, ORM) | Version: | 1.6 |
| Severity: | Normal | Keywords: | |
| Cc: | Triage Stage: | Unreviewed | |
| Has patch: | no | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | no | UI/UX: | no |
Description
We recently pushed to our production environment a feature that involved
summing (with django.db.models.Sum) over CharField entries containing
numeric text. It ended up not working correctly since the postgresql
SUM function can't handle textual arguments, whereas sqlite's apparently
can.
A nice feature that might have saved us the trouble would be to emit
warnings when running an aggregation function with types that don't work
with all of the db backends.
Cf. https://groups.google.com/forum/#!topic/django-developers/z1LXMNdXEFM
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You should use the same backend for production, staging, and unit tests. Doing this is a good practice and negates the need for this feature. Marking as wontfix because this feature only benefits a bad practice.