Question

所以我试图通过向其添加两列来迁移表。 startDate和endDate。使用south用于Django，这应该是一个简单的迁移。我还有大量其他带有dateTimes的表格，但由于某种原因，我在这里得到并发布，我没有看到它。

堆栈跟踪说明：

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

以下是我要迁移的模型：

# 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()

数据库中已存在除startDate和endDate以外的所有字段。因此，为了给这些列提供默认值，我通过终端使用datetime.date.now（）来保持一切正方形。问题是South的schemamigration工作正常，但实际的迁移barfs。

如果有人能看到错误，我的头发会很感激。：P

修改的：包括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'

迁移代码（添加相关代码，因为它有点长）：

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

我必须将south的{{1}}版本升级到版本django。

必须运行以下命令：

0.8.4

或者，如果使用sudo easy_install -U South：

pip

之后，我的迁移按预期工作。

Django South错误：AttributeError：'DateTimeField'对象没有属性'model'

1 个答案: