TypeError: Error when calling the metaclass bases

[fbngrm]

Using South for migrations I get a TypeError when initializing:

./manage.py schemamigration myapp --initial

TypeError: Error when calling the metaclass bases
type() argument 1 must be string, not unicode

class Photo(models.Model):
    name = models.CharField(max_length=50)
    image = models.ImageField(upload_to='...')

class Gallery(models.Model):
    name = models.CharField(max_length=50)
    photos = SortedManyToManyField(Photo)

[gregmuellegger]

Ok. I will have a look. But before that, could you please re-run the
command with the --traceback option and paste the full resulting
traceback here?

./manage.py schemamigration myapp --initial --traceback

That would make the investigation much easier.
Am 05.05.2014 22:08 schrieb "fgrimme" notifications@github.com:

Using South for migrations I get a TypeError when initializing:

./manage.py schemamigration myapp --initial

TypeError: Error when calling the metaclass bases
type() argument 1 must be string, not unicode

class Photo(models.Model):
name = models.CharField(max_length=50)
image = models.ImageField(upload_to='...')

class Gallery(models.Model):
name = models.CharField(max_length=50)
photos = SortedManyToManyField(Photo)

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/22
.

[fbngrm]

Thx - here is the traceback.
For some reason model_name is unicode instead of str here. May be this is related to Python 3 support?
https://code.djangoproject.com/ticket/20207#no1

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 222, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 254, in execute
    self.validate()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 280, in validate
    num_errors = get_validation_errors(s, app)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/validation.py", line 35, in get_validation_errors
    for (app_name, error) in get_app_errors().items():
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/loading.py", line 166, in get_app_errors
    self._populate()
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/loading.py", line 72, in _populate
    self.load_app(app_name, True)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/loading.py", line 96, in load_app
    models = import_module('.models', app_name)
  File "/usr/local/lib/python2.7/dist-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/home/f/work/py/vojd-website/vojdnet/models.py", line 110, in <module>
    class Gallery(models.Model):
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 145, in __new__
    new_class.add_to_class(obj_name, obj)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 265, in add_to_class
    value.contribute_to_class(cls, name)
  File "/usr/local/lib/python2.7/dist-packages/django_sortedm2m-0.2.0-py2.7.egg/sortedm2m/fields.py", line 165, in contribute_to_class
    self.rel.through = self.create_intermediary_model(cls, name)
  File "/usr/local/lib/python2.7/dist-packages/django_sortedm2m-0.2.0-py2.7.egg/sortedm2m/fields.py", line 159, in create_intermediary_model
    model = type(model_name, (models.Model,), attrs)
TypeError: Error when calling the metaclass bases
    type() argument 1 must be string, not unicode

I fixed it changing the line:
model = type(model_name, (models.Model,), attrs)
to
model = type(str(model_name), (models.Model,), attrs)

This raises another error related to south:

! Cannot freeze field 'vojdnet.gallery.photos'
 ! (this field has class sortedm2m.fields.SortedManyToManyField)

 ! South cannot introspect some fields; this is probably because they are custom
 ! fields. If they worked in 0.6 or below, this is because we have removed the
 ! models parser (it often broke things).
 ! To fix this, read http://south.aeracode.org/wiki/MyFieldsDontWork

I am using South 0.7.6, Django 1.5.1 and Python 2.7

[fbngrm]

I was able to resolve the unicode & introspection rules errors by installing everything again via pip.
I used python setup.py install before which resulted in missing introspection rules for the sortedm2m field.

Thanks for your effort anyway.