After upgrading to 0.7 i get this error

[ozexpert]

/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/mongoengine/fields.py:732: FutureWarning: ReferenceFields will default to using ObjectId strings in 0.8, set DBRef=True if this isn't desired
warnings.warn(msg, FutureWarning)
Unhandled exception in thread started by <bound method Command.inner_run of <django.contrib.staticfiles.management.commands.runserver.Command object at 0x19a17d0>>
Traceback (most recent call last):
File "/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 91, in inner_run
self.validate(display_num_errors=True)
File "/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/django/core/management/base.py", line 266, in validate
num_errors = get_validation_errors(s, app)
File "/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/django/core/management/validation.py", line 30, in get_validation_errors
for (app_name, error) in get_app_errors().items():
File "/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/django/db/models/loading.py", line 158, in get_app_errors
self._populate()
File "/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/django/db/models/loading.py", line 64, in _populate
self.load_app(app_name, True)
File "/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/django/db/models/loading.py", line 88, in load_app
models = import_module('.models', app_name)
File "/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
import(name)
File "/home/young/Webproject/p4n/../p4n/common/models/init.py", line 18, in
class User(DiffDirtyMixin, BaseUser):
File "/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/mongoengine/base.py", line 796, in new
for spec in meta['indexes']]
File "/home/young/.virtualenvs/p27d14mongonew/local/lib/python2.7/site-packages/mongoengine/queryset.py", line 515, in _build_index_spec
if key.startswith("-"):
AttributeError: 'tuple' object has no attribute 'startswith'

[AlexKovalevych]

the same issue here, mongoengine version 0.7, python version 2.7.3, mongodb version 2.0.7. Ideas?

[shinnpet]

same issue , I cracked the code and it works now
Foucs on the function parameters (spec)

def _build_index_spec(cls, doc_cls, spec_old):
"""Build a PyMongo index spec from a MongoEngine index spec.
"""

    #----------add by shinnpet---------------
    import copy
    spec = copy.copy(spec_old)
    #-------------------------------------------------

[rozza]

Apologies all, that got missed in the release candidate - this has been fixed and 0.7.1 has been released to pypi

[shinnpet]

thanks rozza's effort !