#28731: Passing an empty Q() to a When inside a Case causes an OperationError
-------------------------------------+-------------------------------------
Reporter: Tom van | Owner: nobody
Bussel |
Type: Bug | Status: new
Component: Database | Version: 1.11
layer (models, ORM) |
Severity: Normal | Keywords:
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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The following code causes an OperationError:
{{{
q = Q() # Dynamically constructed, possibly empty
x = TestModel.objects.annotate(test_name=When(q, then=Value(True)),
default=Value(False), output_field=BooleanField())).all()
print(x)
}}}
The code above results in a SQL query which contains {{{CASE WHEN
THEN}}}, with nothing between the WHEN and THEN.
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Ticket URL: <https://code.djangoproject.com/ticket/28731>
Django <https://code.djangoproject.com/>
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