#29058: Adding 'null=True' to a PointField doesn't create working migration
-------------------------------------+-------------------------------------
Reporter: Yaman | Owner: nobody
Ozakin |
Type: Bug | Status: new
Component: | Version: 1.11
Migrations | Keywords: geodjango,
Severity: Normal | pointfield
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
before:
{{{
class House(models.Model):
point = models.PointField()
}}}
after:
{{{
class House(models.Model):
point = models.PointField(null=True)
}}}
migration:
{{{
class Migration(migrations.Migration):
dependencies = [
('myapp', '0001_initial'),
]
operations = [
migrations.AlterField(
model_name='house',
name='point',
field=django.contrib.gis.db.models.fields.PointField(null=True,
srid=4326),
),
]
}}}
Traceback:
{{{
python manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, contenttypes, myapp, sessions
Running migrations:
Applying myapp.0002_auto_20180125_1119...Traceback (most recent call
last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/site-
packages/django/core/management/__init__.py", line 364, in
execute_from_command_line
utility.execute()
File "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/site-
packages/django/core/management/__init__.py", line 356, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/site-
packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/site-
packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/site-
packages/django/core/management/commands/migrate.py", line 204, in handle
fake_initial=fake_initial,
File "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/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 "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/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 "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/site-
packages/django/db/migrations/executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/site-
packages/django/db/migrations/migration.py", line 129, in apply
operation.database_forwards(self.app_label, schema_editor, old_state,
project_state)
File "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/site-
packages/django/db/migrations/operations/fields.py", line 216, in
database_forwards
schema_editor.alter_field(from_model, from_field, to_field)
File "/Users/Basia/yamyam/research/django/myenv/lib/python3.6/site-
packages/django/db/backends/base/schema.py", line 494, in alter_field
(old_field, new_field),
ValueError: Cannot alter field myapp.House.point into myapp.House.point -
they do not properly define db_type (are you using a badly-written custom
field?)
}}}
Using Spatialite as backend engine.
--
Ticket URL: <https://code.djangoproject.com/ticket/29058>
Django <https://code.djangoproject.com/>
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