#26881: Crash when creating migrations with managers having
use_in_migrations=True
-------------------------------------------+------------------------
Reporter: claudep | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.10
Severity: Release blocker | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------------+------------------------
Considering this model layout:
{{{
from django.db import models
class PersonManager(models.Manager):
use_in_migrations = True
class Person(models.Model):
name = models.CharField(max_length=10)
objects = PersonManager()
class Meta:
abstract = True
class BossManager(PersonManager):
use_in_migrations = True
class Boss(Person):
objects = BossManager()
}}}
Django 1.10 crashes when calling `makemigrations`:
{{{
...
File "/home/claude/virtualenvs/djangogit/local/lib/python2.7/site-
packages/django/db/migrations/autodetector.py", line 172, in
_detect_changes
self.generate_created_models()
File "/home/claude/virtualenvs/djangogit/local/lib/python2.7/site-
packages/django/db/migrations/autodetector.py", line 553, in
generate_created_models
managers=model_state.managers,
File "/home/claude/virtualenvs/djangogit/local/lib/python2.7/site-
packages/django/db/migrations/operations/models.py", line 64, in __init__
_check_for_duplicates('managers', (name for name, _ in self.managers))
File "/home/claude/virtualenvs/djangogit/local/lib/python2.7/site-
packages/django/db/migrations/operations/models.py", line 20, in
_check_for_duplicates
"Found duplicate value %s in CreateModel %s argument." % (val,
arg_name)
ValueError: Found duplicate value objects in CreateModel managers
argument.
}}}
while Django 1.9 creates the migration without problem.
--
Ticket URL: <https://code.djangoproject.com/ticket/26881>
Django <https://code.djangoproject.com/>
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