Review : lorsqu'on vote, erreur

[numahell]

Lorsqu'on fait un nouveau vote, ou qu'on change notre vote, une erreur s'affiche

Database is trying to update a relational field of type DecimalField with a value of type ProposalScoreExpression. Make sure you are setting the correct relations

Environment:


Request Method: POST
Request URL: http://localhost:8000/reviews/review/3/

Django Version: 1.7.8
Python Version: 2.7.9
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.messages',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'bootstrapform',
 'pinax_theme_bootstrap',
 'account',
 'easy_thumbnails',
 'eventlog',
 'markitup',
 'metron',
 'reversion',
 'sitetree',
 'taggit',
 'timezones',
 'symposion',
 'symposion.boxes',
 'symposion.cms',
 'symposion.conference',
 'symposion.proposals',
 'symposion.reviews',
 'symposion.schedule',
 'symposion.speakers',
 'symposion.sponsorship',
 'symposion.teams',
 'cdl',
 'cdl.proposals']
Installed Middleware:
['django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'reversion.middleware.RevisionMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']


Traceback:
File "/home/manue/.virtualenvs/symposion/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  111.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/manue/.virtualenvs/symposion/local/lib/python2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
  21.                 return view_func(request, *args, **kwargs)
File "/home/manue/.virtualenvs/symposion/src/symposion/symposion/reviews/views.py" in review_detail
  203.                 review.save()
File "/home/manue/.virtualenvs/symposion/src/symposion/symposion/reviews/models.py" in save
  130.                 self.proposal.result.update_vote(self.vote, previous=vote.vote)
File "/home/manue/.virtualenvs/symposion/src/symposion/symposion/reviews/models.py" in update_vote
  281.         model._default_manager.filter(pk=self.pk).update(score=ProposalScoreExpression())
File "/home/manue/.virtualenvs/symposion/local/lib/python2.7/site-packages/django/db/models/query.py" in update
  583.             rows = query.get_compiler(self.db).execute_sql(CURSOR)
File "/home/manue/.virtualenvs/symposion/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  1005.         cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
File "/home/manue/.virtualenvs/symposion/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  776.             sql, params = self.as_sql()
File "/home/manue/.virtualenvs/symposion/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in as_sql
  968.                                     (field.__class__.__name__, val.__class__.__name__))

Exception Type: TypeError at /reviews/review/3/
Exception Value: Database is trying to update a relational field of type DecimalField with a value of type ProposalScoreExpression. Make sure you are setting the correct relations