python - init__ - django missing 1 required positional argument on_delete

Error de Django South: AttributeError: el objeto ''DateTimeField'' no tiene atributo ''model''`

Question

Así que estoy tratando de migrar una tabla agregándole dos columnas. Una fecha de startDate y una fecha de endDate . Usando el south para Django, esto debería ser una simple migración. También tengo un montón de otras tablas con dateTimes en ellas, pero por alguna razón estoy obteniendo un problema aquí y no lo veo.

La traza de la pila está indicando:

AttributeError: ''DateTimeField'' object has no attribute ''model''

Aquí está el modelo que estoy migrando:

# Keep track of who has applied for a Job
class JobApply(models.Model):
    job = models.ForeignKey(Jobs)
    user = models.ForeignKey(User)
    # Keep track of the Developer accepted to do the work
    accepted_dev = models.IntegerField(null=False, blank=False, default=0)
    # If 1 (True) the User has applied to this job
    isApplied = models.BooleanField(default=0)
    startDate = models.DateTimeField()
    endDate = models.DateTimeField()

Todos los campos excepto startDate y endDate ya existen en la base de datos. Entonces, para dar a esas columnas los valores predeterminados, uso datetime.date.now () a través del terminal para mantener todo en orden. El problema es que la schemamigration de schemamigration funciona muy bien, pero la migración real barfs.

Si alguien puede ver el error, mi cabello lo apreciaría. :PAG

EDITAR : incluyendo Stacktrace:

Running migrations for insource:
 - Migrating forwards to 0004_auto__add_field_jobapply_startDate__add_field_jobapply_endDate.
 > insource:0004_auto__add_field_jobapply_startDate__add_field_jobapply_endDate
Error in migration: insource:0004_auto__add_field_jobapply_startDate__add_field_jobapply_endDate
Traceback (most recent call last):
  File "./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 399, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 392, 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 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/south/management/commands/migrate.py", line 111, in handle
    ignore_ghosts = ignore_ghosts,
  File "/usr/local/lib/python2.7/dist-packages/south/migration/__init__.py", line 220, in migrate_app
    success = migrator.migrate_many(target, workplan, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 229, in migrate_many
    result = migrator.__class__.migrate_many(migrator, target, migrations, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 304, in migrate_many
    result = self.migrate(migration, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 129, in migrate
    result = self.run(migration, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 113, in run
    return self.run_migration(migration, database)
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 83, in run_migration
    migration_function()
  File "/usr/local/lib/python2.7/dist-packages/south/migration/migrators.py", line 59, in <lambda>
    return (lambda: direction(orm))
  File "/home/jared/Desktop/School/insource/insource/migrations/0004_auto__add_field_jobapply_startDate__add_field_jobapply_endDate.py", line 14, in forwards
    keep_default=False)
  File "/usr/local/lib/python2.7/dist-packages/south/db/generic.py", line 47, in _cache_clear
    return func(self, table, *args, **opts)
  File "/usr/local/lib/python2.7/dist-packages/south/db/generic.py", line 411, in add_column
    sql = self.column_sql(table_name, name, field)
  File "/usr/local/lib/python2.7/dist-packages/south/db/generic.py", line 706, in column_sql
    default = field.get_db_prep_save(default, connection=self._get_connection())
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 350, in get_db_prep_save
    prepared=False)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 911, in get_db_prep_value
    value = self.get_prep_value(value)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 902, in get_prep_value
    (self.model.__name__, self.name, value),
AttributeError: ''DateTimeField'' object has no attribute ''model''

Código de migración (agregando código relevante ya que es un poco largo):

def forwards(self, orm):
    # Adding field ''JobApply.startDate''
    db.add_column(u''insource_jobapply'', ''startDate'',
                  self.gf(''django.db.models.fields.DateTimeField'')(default=datetime.datetime(2013, 12, 7, 0, 0)),
                  keep_default=False)

    # Adding field ''JobApply.endDate''
    db.add_column(u''insource_jobapply'', ''endDate'',
                  self.gf(''django.db.models.fields.DateTimeField'')(default=datetime.datetime(2013, 12, 7, 0, 0)),
                  keep_default=False)


def backwards(self, orm):
    # Deleting field ''JobApply.startDate''
    db.delete_column(u''insource_jobapply'', ''startDate'')

    # Deleting field ''JobApply.endDate''
    db.delete_column(u''insource_jobapply'', ''endDate'')


u''insource.jobapply'': {
    ''Meta'': {''object_name'': ''JobApply''},
    ''accepted_dev'': (''django.db.models.fields.IntegerField'', [], {''default'': ''0''}),
    ''endDate'': (''django.db.models.fields.DateTimeField'', [], {}),
    u''id'': (''django.db.models.fields.AutoField'', [], {''primary_key'': ''True''}),
    ''isApplied'': (''django.db.models.fields.BooleanField'', [], {''default'': ''False''}),
    ''job'': (''django.db.models.fields.related.ForeignKey'', [], {''to'': u"orm[''insource.Jobs'']"}),
    ''startDate'': (''django.db.models.fields.DateTimeField'', [], {}),
    ''user'': (''django.db.models.fields.related.ForeignKey'', [], {''to'': u"orm[''auth.User'']"})
},

Answer 1

Tuve que actualizar mi versión de south para django a la versión 0.8.4 .

Tenía que ejecutar el siguiente comando:

sudo easy_install -U South

O, si usas pip :

pip install South --upgrade

Después de eso, mi migración funcionó como se esperaba.