这是视图：
def showProject(request, project_slug):
project = Project.objects.get(slug=project_slug)
tickets = Ticket.objects.filter(project=project)
payload = { 'project':project, 'tickets':tickets }
return render(request, 'project/project.html', payload)
这是错误：
追溯：
get_response 中的文件“C:\Python27\lib\site-packages\django-1.3-py2.7.egg\django\core\handlers\base.py”
111. 响应 = 回调（请求，*callback_args，**callback_kwargs）
showProject 中的文件“C:\project\views.py”
13. 项目 = Project.objects.get(slug=project_slug)
get 中的文件“C:\Python27\lib\site-packages\django-1.3-py2.7.egg\django\db\models\manager.py”
132.返回 self.get_query_set().get(*args, **kwargs)
get 中的文件“C:\Python27\lib\site-packages\django-1.3-py2.7.egg\django\db\models\query.py”
349.% self.model._meta.object_name)
异常类型：DoesNotExist at /project/ticket/
异常值：项目匹配查询不存在。
对预期内容的更详细解释：我有一个侧边栏，列出了所有打开的“门票”。当我点击其中一张票时，它应该打开它。相反，当我尝试打开它时，我收到此错误。怎么了？
根据请求，这里是模型类：
class Project(models.Model):
"""simple project for tracking purposes"""
name = models.CharField(max_length = 64)
slug = models.SlugField(max_length = 100, unique=True,blank=True, null=True)
description = models.CharField(max_length = 255)
owner = models.ForeignKey(User, related_name="+")
created_on = models.DateTimeField(auto_now_add = 1)
active = models.BooleanField(default=True)
parent = models.ForeignKey("self", related_name="children", null=True, blank=True)
repository = models.ForeignKey("Repository", related_name="projects", null=True, blank=True)
book = models.ForeignKey(Book, related_name="+", null=True, blank=True)
acl = models.ManyToManyField(AclEntry)
def save (self):
if not self.slug:
self.slug = '-'.join(self.name.lower().split())
if not self.book:
book = Book(name=self.name, owner=self.owner)
book.save()
self.book = book
super(Project, self).save()
似乎我所做的一切都是为了回到这里，我不明白为什么？我缺少什么？非常感谢！
