#35024: Creating model objects crashes on fields with database converters when
RETURNING is not supported.
-------------------------------------+-------------------------------------
Reporter: Mariusz | Owner: Mariusz Felisiak
Felisiak |
Type: Bug | Status: assigned
Component: Database | Version: 5.0
layer (models, ORM) |
Severity: Release | Keywords:
blocker |
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
Creating model objects crashes on fields with database converters when
RETURNING is not supported. For example
{{{#!python
class GeneratedBooleanFieldModel(Model):
value = IntegerField(null=True)
has_value = GeneratedField(
expression=Q(value__isnull=False),
output_field=BooleanField(),
db_persist=False,
)
}}}
crashes with:
{{{
File "/home/jenkins/workspace/pull-requests-
focal/database/spatialite/label/focal-
pr/python/python3.10/django/db/models/query.py", line 1845, in _insert
return query.get_compiler(using=using).execute_sql(returning_fields)
File "/home/jenkins/workspace/pull-requests-
focal/database/spatialite/label/focal-
pr/python/python3.10/django/db/models/sql/compiler.py", line 1853, in
execute_sql
rows = list(self.apply_converters(rows, converters))
File "/home/jenkins/workspace/pull-requests-
focal/database/spatialite/label/focal-
pr/python/python3.10/django/db/models/sql/compiler.py", line 1500, in
apply_converters
value = row[pos]
IndexError: list index out of range
}}}
This is a long standing issue, however it caused a crash of
`GeneratedField` for all output fields that have backend-specific
converters when `RETURNING` clause is not supported (MySQL and SQLite <
3.35). We should exacerbate severity to a release blocker.
Regression in d9de74141e8a920940f1b91ed0a3ccb835b55729.
--
Ticket URL: <https://code.djangoproject.com/ticket/35024>
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