Opened 7 years ago

Last modified 7 years ago

#28781 closed Bug

Order of queryset.union() with queryset.values() is incorrect — at Version 1

Reported by: Amir Aziiev Owned by: nobody
Component: Database layer (models, ORM) Version: 1.11
Severity: Normal Keywords: union, values
Cc: Mariusz Felisiak Triage Stage: Accepted
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description (last modified by Amir Aziiev)

For example:

from django.db import models


class MyModel(models.Model):
    col1 = models.CharField(max_length=11)
    col2 = models.CharField(max_length=22)
    col3 = models.CharField(max_length=33)


qs = MyModel.objects.union(MyModel.objects.all(), all=True).values('col2', 'col3', 'col1', 'id').order_by('col1')
print(qs.query)
# Expected SQL
"""
(SELECT "mymodel"."id", "mymodel"."col1", "mymodel"."col2", "mymodel"."col3" FROM "mymodel")
  UNION ALL
(SELECT"mymodel"." id", "mymodel"."col1", "mymodel"."col2", "mymodel"."col3" FROM "mymodel")
  ORDER BY (3);
------------^
"""
# Must be SQL
"""
(SELECT "mymodel"."id", "mymodel"."col1", "mymodel"."col2", "mymodel"."col3" FROM "mymodel")
  UNION ALL
(SELECT"mymodel"." id", "mymodel"."col1", "mymodel"."col2", "mymodel"."col3" FROM "mymodel")
  ORDER BY (2);
------------^

Change History (1)

comment:1 by Amir Aziiev, 7 years ago

Description: modified (diff)
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