Opened 4 years ago
Last modified 4 years ago
#31815 closed Bug
Can't Create PostgreSQL Database Constraints with non latin-1 encodings — at Initial Version
| Reported by: | JSAustin | Owned by: | nobody |
|---|---|---|---|
| Component: | Database layer (models, ORM) | Version: | dev |
| Severity: | Normal | Keywords: | encoding utf-8 |
| Cc: | Simon Charette | Triage Stage: | Accepted |
| Has patch: | yes | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | no | UI/UX: | no |
Description
I am trying to create a model with a constraint on a field that uses UTF-8 encodings. Specifically, I'm trying to constrain scientific unit strings. The problematic one is: 'µg/mL'. The µ symbol has a b'\xc2\xb5' encoding with utf-8. When I add this as one of the check constraints, I get this error:
File "D:\DjangoSite\venv\lib\site-packages\django\db\backends\postgresql\schema.py", line 38, in quote_value
return psycopg2.extensions.adapt(value).getquoted().decode()
UnicodeEncodeError: 'latin-1' codec can't encode character '\u03bc' in position 0: ordinal not in range(256)
The migration is:
migrations.AddConstraint(
model_name='biomarkertestinfo',
constraint=models.CheckConstraint(check=models.Q(unitin=['μg/mL', 'ng/mL', 'pg/mL', 'U/L', 'mIU/mL', 'kIU/mL']), name='constrained biomarker unit choices'),
)