#22030: AttributeError: 'CharField' object has no attribute 'swappable_setting'
-------------------------------------------+---------------------
Reporter: bmispelon | Owner:
Type: Bug | Status: new
Component: Migrations | Version: 1.6
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 |
-------------------------------------------+---------------------
Here's how to reproduce:
Create an app with a simple `models.py` (and put it in
`settings.INSTALLED_APPS`):
{{{#!python
from django.db import models
class Foo(models.Model):
pass
}}}
Run `makemigrations` and then `migrate`.
Then change the `Foo` model to be:
{{{#!python
class Foo(models.Model):
foo = models.CharField(max_length=10, default='')
}}}
After that, running `manage.py makemigrations` breaks with the following
traceback:
{{{
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "./django/core/management/__init__.py", line 427, in
execute_from_command_line
utility.execute()
File "./django/core/management/__init__.py", line 419, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "./django/core/management/base.py", line 287, in run_from_argv
self.execute(*args, **options.__dict__)
File "./django/core/management/base.py", line 336, in execute
output = self.handle(*args, **options)
File "./django/core/management/commands/makemigrations.py", line 80, in
handle
changes = autodetector.changes(graph=loader.graph,
trim_to_apps=app_labels or None)
File "./django/db/migrations/autodetector.py", line 33, in changes
changes = self._detect_changes()
File "./django/db/migrations/autodetector.py", line 236, in
_detect_changes
swappable_setting = new_apps.get_model(app_label,
model_name)._meta.get_field_by_name(field_name)[0].swappable_setting
AttributeError: 'CharField' object has no attribute 'swappable_setting'
}}}
Breakage was introduced in commit
11c021336c8cb1c92be998f1a44c89a746275107.
--
Ticket URL: <https://code.djangoproject.com/ticket/22030>
Django <https://code.djangoproject.com/>
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