#304 closed defect (duplicate)
Changes to auth.LogEntry in changeset [469] breaks Oracle backend.
| Reported by: | Jason Huggins | Owned by: | Adrian Holovaty |
|---|---|---|---|
| Component: | Database layer (models, ORM) | Version: | |
| Severity: | major | Keywords: | oracle TextField CharField Long |
| Cc: | Triage Stage: | Unreviewed | |
| Has patch: | no | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | no | UI/UX: | no |
Description
Changeset [469] added an additional "TextField" objects to the LogEntry model.
In the Oracle backend (#87), I mapped TextField types in Django to the "Long" datatype in the db, because the Model documentaton suggests TextFields should be used to store (potentially large) html content. If I used any other string datatype (like varchar2), the max length of the field would be 4000 characters/bytes. That isn't good. Yet, again, Oracle stinks compared to PostgreSQL, because Oracle only allows one "Long" field type per table.
If LogEntry's "object_id" needs to only hold small strings, and it is going to be less than 4000 characters, I'd suggest you change it to CharField.
After changeset #469, I get this error in django-admin.py init:
"""
Error: The database couldn't be initialized. Here's the full exception:
ORA-01754: a table may contain only one column of type LONG
"""
I've confirmed that changing LogEntry's object_id field to "CharField" fixes the problem for Oracle.
Change History (2)
comment:1 by , 19 years ago
comment:2 by , 18 years ago
| Resolution: | → duplicate |
|---|---|
| Status: | new → closed |
Marking this as a duplicate of #87.
You might be able to use CLOBs instead of LONG. CLOB can be indexed just as TEXT in PostgreSQL. But the query interface for CLOBs is a bit weird, as they are only accessible thru the large object API and not as a direct field, IIRC.