#31301: bulk_create with ForeignKey fields with mixed filled/None values fails
-------------------------------------+-------------------------------------
Reporter: Hans | Owner: nobody
Aarne Liblik |
Type: Bug | Status: new
Component: Database | Version: 3.0
layer (models, ORM) |
Severity: Normal | Keywords: oracle sql
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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I have a model with ForeignKey (null=True) to another model
{{{
class A(models.Model):
name = models.CharField()
class B(models.Model):
name = models.CharField()
a = models.ForeignKey(A, on_delete=models.CASCADE, null=True)
}}}
When I try to use bulk_create as follows
{{{
B.objects.bulk_create([
B(name='first', a_id=1)
B(name='seconds', a_id=None)
])
}}}
the query fails with error
{{{
django.db.utils.DatabaseError: ORA-01790: expression must have same
datatype as corresponding expression
}}}
I got bulk_create working if the ForeignKey references are either All None
or All NOT None. It seems like the fix introduced in
https://code.djangoproject.com/ticket/22669 fixes the case for
NumberFields and CharFields, but ForeignKey field 'target_field' for me is
'AutoField' which is not defined in
{{{
django/db/backends/oracle/utils.py#52 class BulkInsertMapper:
}}}
Manually editing that this file and adding
{{{
class BulkInsertMapper:
...
types: {
...
...
'AutoField': NUMBER
}
}}}
fixes the issue for me.
--
Ticket URL: <https://code.djangoproject.com/ticket/31301>
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