It is a blog app, I have created a Article model and Tag model. when I add data to Article table from Admin interface, the data is stored to database, but if I click the link to change the entry, it throws an exception "string indices must be integers, not str", the traceback is as follows: Environment:
Request Method: GET Request URL: http://localhost:8000/admin/blog/article/1/ Django Version: 1.5.1 Python Version: 2.7.3 Installed Applications: ('django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.admin', 'blog') Installed Middleware: ('django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware') Traceback: File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 115. response = callback(request, *callback_args, **callback_kwargs) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in wrapper 372. return self.admin_site.admin_view(view)(*args, **kwargs) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view 91. response = view_func(request, *args, **kwargs) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func 89. response = view_func(request, *args, **kwargs) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner 202. return view(request, *args, **kwargs) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapper 25. return bound_func(*args, **kwargs) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view 91. response = view_func(request, *args, **kwargs) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py" in bound_func 21. return func(self, *args2, **kwargs2) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/transaction.py" in inner 223. return func(*args, **kwargs) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in change_view 1112. form = ModelForm(instance=obj) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/forms/models.py" in __init__ 244. object_data = model_to_dict(instance, opts.fields, opts.exclude) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/forms/models.py" in model_to_dict 129. data[f.name] = list(f.value_from_object(instance).values_list('pk', flat=True)) File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/models/fields/related.py" in value_from_object 1333. return getattr(obj, self.attname).all() File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/models/manager.py" in all 128. return self.get_query_set() File "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/models/fields/related.py" in get_query_set 612. return self.instance._prefetched_objects_cache[self.prefetch_cache_name] Exception Type: TypeError at /admin/blog/article/1/ Exception Value: string indices must be integers, not str the code of Article model and Tag model is as follows: class Tag(models.Model): name = models.CharField(max_length=50, unique=True, verbose_name='标签') slug = models.SlugField() def __unicode__(self): return self.name class Meta: verbose_name = '标签' verbose_name_plural = '标签' @models.permalink def get_absolute_url(self): return ('blog_tag', (), {'idx': self.id, 'slug': self.slug}) # Create your models here. class Article(models.Model): """ the model for blog article """ STATUS_CHOICE = ( (1, '编辑'), (2, '完成'), (3, '失效'), ) title = models.CharField(max_length=100, verbose_name='标题') slug = models.SlugField(max_length=100) content = models.TextField(verbose_name='内容') created_time = models.DateTimeField(auto_now_add=True, verbose_name="创建时间") modified_time = models.DateTimeField(default=datetime.now, verbose_name="修改时间") tags = models.ManyToManyField(Tag, verbose_name='标签') category = models.ForeignKey('Category', blank=True, null=True, verbose_name='分类') always_top = models.BooleanField(default=False, verbose_name='置顶') author = models.CharField(max_length=40, verbose_name='作者') status = models.IntegerField(choices=STATUS_CHOICE, default=1, verbose_name='状态') @models.permalink def get_absolute_url(self): return ('blog_article', (), {'idx': self.id, 'slug': self.slug}) def __getattr__(self, name): """ add two attributes(summary, visible_comments) to the object Arguments: - `name`: """ if name == 'summary': return util.get_summary(self.content) else: return '' def __unicode__(self): return self.title class Meta: ordering = ['-always_top', '-created_time'] verbose_name = '博客文章' verbose_name_plural = '博客文章' the problem seems to be caused by "tags = models.ManyToManyField(Tag, verbose_name='标签')" , when I delete this line, there is no problem, but when I add it to the model, django throws an expcetion, this problem really annoys me, who can help me? -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/django-users. For more options, visit https://groups.google.com/groups/opt_out.
