#28084: FieldDoesNotExist when running a migration on Django 1.11
-----------------------------------------+------------------------
Reporter: Bas ten Berge | Owner: nobody
Type: Bug | Status: new
Component: Uncategorized | Version: 1.11
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-----------------------------------------+------------------------
Hi,
I'm running into an issue when performing this change to this model:
{{{
class TopicOwnerThoughtStatus(models.Model):
'''
Registers topic owner stats
'''
thought = models.ForeignKey(Thought, help_text='Associates the state
to a thought', db_index=True)
user = models.ForeignKey(settings.AUTH_USER_MODEL,
related_name='topicownerstatus_set', help_text='Associates this state to
an user')
topic = models.ForeignKey(Topic, help_text='Associates this state to a
thought and topic')
notified_at = models.DateTimeField(null=True, blank=True,
help_text='Contains the timestamp the topicowner was notified')
shown_at = models.DateTimeField(null=True, blank=True,
help_text='Contains the timestamp the topicowner viewed the thoughts')
finished_at = models.DateTimeField(null=True, blank=True,
help_text='Contains the timestamp the topicowner marked the topic closed')
class Meta:
unique_together = ('thought', 'user', 'topic', )
ordering = ('thought', )
verbose_name_plural = 'Topic owner status'
}}}
Changing this model to:
{{{
class TopicOwnerThoughtStatus(models.Model):
'''
Registers topic owner stats
'''
thought = models.ForeignKey(Thought, help_text='Associates the state
to a thought', db_index=True)
user = models.ForeignKey(settings.AUTH_USER_MODEL,
related_name='topicownerstatus_set', help_text='Associates this state to
an user')
topic_selector = models.CharField(max_length=36, null=True,
blank=True, help_text='Contains the topic selector')
notified_at = models.DateTimeField(null=True, blank=True,
help_text='Contains the timestamp the topicowner was notified')
shown_at = models.DateTimeField(null=True, blank=True,
help_text='Contains the timestamp the topicowner viewed the thoughts')
finished_at = models.DateTimeField(null=True, blank=True,
help_text='Contains the timestamp the topicowner marked the topic closed')
class Meta:
unique_together = ('thought', 'user', 'topic_selector', )
ordering = ('thought', )
verbose_name_plural = 'Topic owner status'
}}}
will allow me to create a migration, but I'm not able to run that
migration:
{{{
(env-brownpapersession)bastb@bastb-
vps:/var/www/brownpapersession/dev/brownpapersession$ python manage.py
migrate Operations to perform:
Apply all migrations: ..., topic
Running migrations:
Applying topic.0014_auto_20170417_0941...Traceback (most recent call
last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/core/management/__init__.py", line 363, in
execute_from_command_line
utility.execute()
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/core/management/__init__.py", line 355, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/core/management/commands/migrate.py", line 204, in handle
fake_initial=fake_initial,
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/db/migrations/executor.py", line 115, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake,
fake_initial=fake_initial)
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/db/migrations/executor.py", line 145, in
_migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake,
fake_initial=fake_initial)
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/db/migrations/executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/db/migrations/migration.py", line 129, in apply
operation.database_forwards(self.app_label, schema_editor, old_state,
project_state)
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/db/migrations/operations/models.py", line 536, in
database_forwards
getattr(new_model._meta, self.option_name, set()),
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/db/backends/base/schema.py", line 348, in
alter_unique_together
self._delete_composed_index(model, fields, {'unique': True},
self.sql_delete_unique)
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/db/backends/base/schema.py", line 371, in
_delete_composed_index
columns = [model._meta.get_field(field).column for field in fields]
File "/var/www/brownpapersession/dev/env-
brownpapersession/local/lib/python2.7/site-
packages/django/db/models/options.py", line 619, in get_field
raise FieldDoesNotExist("%s has no field named '%s'" %
(self.object_name, field_name))
}}}
I'm able to run this migration when following a two-step approach:
* add the topic_selector field
* change the unique_together to read ('thought', 'user',
'thought_selector', )
* create and run the migration
* remove the topic field
* create and run the migration
I'd expect to run this in one migration, though.
--
Ticket URL: <https://code.djangoproject.com/ticket/28084>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
--
You received this message because you are subscribed to the Google Groups
"Django updates" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/django-updates/050.4f316947b56b91f5bad10181249b12d7%40djangoproject.com.
For more options, visit https://groups.google.com/d/optout.
