Re: application of migration fails

It could be a bug or your database might be in an inconsistent state somehow. The next step would be to debug it a bit more and put together a minimal project that reproduces the issue.

On Monday, December 12, 2016 at 4:45:55 PM UTC-5, Francis Fisher wrote:

Any idea if I'm doing something wrong or if I'm running into a bug?

I added some fields to a model, and generated a migration.

When I apply the migration, the migrate command crashes, with both django 1.10.3 and 1.10.4.

I had a similar migration issue with another app in the same project, that occured in django 1.10 and 1.10.3.

Is this crash a known issue/common pitfall?

Cheers,

Frankie

---------------------------------------------

Result of the "makemigrations":

Migrations for 'eveshoppinglist':

  evetools/eveshoppinglist/migrations/0009_auto_20161212_2140.py:

    - Rename field build_location_type on buildline to build_facility_type

    - Rename field from_location_id on moveline to from_facility_id

    - Rename field from_type on moveline to from_facility_type

    - Rename field to_location_id on moveline to to_facility_id

    - Rename field to_type on moveline to to_facility_type

    - Add field build_facility_id to buildline

    - Add field build_system to buildline

    - Add field build_facility_id to buyline

    - Add field build_facility_type to buyline

    - Add field build_system to buyline

    - Add field from_system to moveline

    - Add field to_system to moveline

-----------------------------------------------------------------

Result of "migrate"

  File "evetools/manage.py", line 10, in <module>

    execute_from_command_line(sys.argv)

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 367, in execute_from_command_line

    utility.execute()

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 359, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 294, in run_from_argv

    self.execute(*args, **cmd_options)

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 345, in execute

    output = self.handle(*args, **options)

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/migrate.py", line 204, in handle

    fake_initial=fake_initial,

  File "/usr/local/lib/python2.7/dist-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 "/usr/local/lib/python2.7/dist-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 "/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py", line 244, in apply_migration

    state = migration.apply(state, schema_editor)

  File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/migration.py", line 129, in apply

    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)

  File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/operations/fields.py", line 282, in database_forwards

    to_model._meta.get_field(self.new_name),

  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/schema.py", line 495, in alter_field

    old_db_params, new_db_params, strict)

  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/postgresql/schema.py", line 117, in _alter_field

    new_db_params, strict,

  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/schema.py", line 504, in _alter_field

    fk_names = self._constraint_names(model, [old_field.column], foreign_key=True)

  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/schema.py", line 931, in _constraint_names

    constraints = self.connection.introspection.get_constraints(cursor, model._meta.db_table)

  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/postgresql/introspection.py", line 178, in get_constraints

    "foreign_key": tuple(used_cols[0].split(".", 1)) if kind.lower() == "foreign key" else None,

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