migration.py

# encoding: utf8
from django.db import models, migrations


class Migration(migrations.Migration):
    
    dependencies = [('workflows', '0003_auto_20131212_2349')]

    operations = [
        migrations.AddField(
            field = models.PositiveIntegerField(default=0, verbose_name=u'Errors'),
            name = 'errors',
            model_name = 'workflow',
        ),
    ]

traceback

$ ./manage.py migrate
Operations to perform:
  Synchronize unmigrated apps: sessions, admin, messages, resolv, auth, staticfiles, contenttypes
  Apply all migrations: cleaner, workflows
Synchronizing apps without migrations:
  Creating tables...
  Installing custom SQL...
  Installing indexes...
Installed 0 object(s) from 0 fixture(s)
Running migrations:
  Applying workflows.0004_workflow_errors...Traceback (most recent call last):
  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/loic/Dev/django/django/core/management/__init__.py", line 415, in execute_from_command_line
    utility.execute()
  File "/Users/loic/Dev/django/django/core/management/__init__.py", line 407, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/loic/Dev/django/django/core/management/base.py", line 244, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/Users/loic/Dev/django/django/core/management/base.py", line 291, in execute
    output = self.handle(*args, **options)
  File "/Users/loic/Dev/django/django/core/management/commands/migrate.py", line 146, in handle
    executor.migrate(targets, plan, fake=options.get("fake", False))
  File "/Users/loic/Dev/django/django/db/migrations/executor.py", line 60, in migrate
    self.apply_migration(migration, fake=fake)
  File "/Users/loic/Dev/django/django/db/migrations/executor.py", line 94, in apply_migration
    migration.apply(project_state, schema_editor)
  File "/Users/loic/Dev/django/django/db/migrations/migration.py", line 97, in apply
    operation.database_forwards(self.app_label, schema_editor, project_state, new_state)
  File "/Users/loic/Dev/django/django/db/migrations/operations/fields.py", line 30, in database_forwards
    schema_editor.add_field(from_model, to_model._meta.get_field_by_name(self.name)[0])
  File "/Users/loic/Dev/django/django/db/backends/sqlite3/schema.py", line 90, in add_field
    self._remake_table(model, create_fields=[field])
  File "/Users/loic/Dev/django/django/db/backends/sqlite3/schema.py", line 62, in _remake_table
    self.quote_name(model._meta.db_table),
  File "/Users/loic/Dev/django/django/db/backends/schema.py", line 95, in execute
    cursor.execute(sql, params)
  File "/Users/loic/Dev/django/django/db/backends/utils.py", line 77, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/Users/loic/Dev/django/django/db/backends/utils.py", line 61, in execute
    return self.cursor.execute(sql, params)
  File "/Users/loic/Dev/django/django/db/utils.py", line 93, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/Users/loic/Dev/django/django/db/backends/utils.py", line 61, in execute
    return self.cursor.execute(sql, params)
  File "/Users/loic/Dev/django/django/db/backends/sqlite3/base.py", line 489, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: workflows_workflow__new.errors may not be NULL