Opened 5 years ago

Last modified 5 years ago

#31492 new Bug

Changing field type can cause unrelated nullability change in field on Oracle.

Reported by: Mariusz Felisiak Owned by: nobody
Component: Database layer (models, ORM) Version: 3.0
Severity: Normal Keywords: oracle null
Cc: Ian Bottomley Triage Stage: Accepted
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description

Changing a field type with implicit check constraint (e.g. PositiveIntegerField) to a field without it (e.g. CharField) causes nullability change because Django drops all check constraints in such case, i.e. NOT NULL and "COLUMN" >= 0 constraints (see ​_alter_field()).

Attachments (1)

test.py​ (1.2 KB ) - added by Mariusz Felisiak 5 years ago.

Download all attachments as: .zip

Change History (3)

by Mariusz Felisiak, 5 years ago

Attachment: test.py​ added

comment:1 by Carlton Gibson, 5 years ago

Triage Stage: Unreviewed → Accepted

comment:2 by Ian Bottomley, 5 years ago

Cc: Ian Bottomley added
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