#31843: PicklingError: Can't pickle <class 'django.db.models.query.Row'>:
attribute
lookup Row on django.db.models.query failed
-------------------------------------+-------------------------------------
Reporter: Vitaliy | Owner: nobody
Yelnik |
Type: Bug | Status: new
Component: Database | Version: 3.0
layer (models, ORM) | Keywords: pickle namedtuple
Severity: Normal | values_list
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 new named parameter of QuerySet.values_list() was released In Django
2.0 (#15648).
But resulted namedtuple-s can't be pickled:
{{{
class ModelA(models.Model):
value = models.CharField(max_length=12)
}}}
{{{
In [12]: row = ModelA.objects.values_list('id', 'value',
named=True).first()
In [14]: type(row)
Out[14]: django.db.models.query.Row
In [16]: pickle.dumps(row)
PicklingError: Can't pickle <class 'django.db.models.query.Row'>:
attribute lookup Row on django.db.models.query failed
}}}
In particular, as a result, such requests do not work with cacheops
package.
--
Ticket URL: <https://code.djangoproject.com/ticket/31843>
Django <https://code.djangoproject.com/>
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