django - Matching query does not exist? -

this view:

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) 

this error:

traceback: file "c:\python27\lib\site-packages\django-1.3-py2.7.egg\django\core\handlers\base.py" in get_response   111.                         response = callback(request, *callback_args, **callback_kwargs) file "c:\\project\views.py" in showproject   13.   project = project.objects.get(slug=project_slug) file "c:\python27\lib\site-packages\django-1.3-py2.7.egg\django\db\models\manager.py" in   132.         return self.get_query_set().get(*args, **kwargs) file "c:\python27\lib\site-packages\django-1.3-py2.7.egg\django\db\models\query.py" in   349.                     % self.model._meta.object_name)  exception type: doesnotexist @ /project/ticket/  exception value: project matching query not exist. 

a more detailed explanation of expected: have sidebar lists open "tickets." when click on 1 of tickets, should open it. instead when try open it, i'm getting error. happening? here model class:

class project(models.model):     """simple project 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() 

here template code:

{% block title %}tickets: {{project.name}}{% endblock %}  {% block main %}  <div id="project-nav"> <span><a href="/project/{{project.slug}}/">tickets</a></span> <span><a href="/book/{{book.slug}}{{book.name}}">docs</a></span> <span><a href="/project/{{project.slug}}/browse">browser</a></span> </div> <div id="action-nav"> {% block actions %} <span><a href="/project/{{project.slug}}/tickets/create">create ticket</a></span> <span><a href="/project/{{ project.slug }}/tickets/recent">recent           activity</a>      </span> <span><a href="/project/{{ project.slug }}/tickets/my/">my tickets</a></span> {% endblock %} </div> {% ticket in tickets %}  <div class="ticket"> <div class="ticket-header">     <div class="ticket-title">         <a href="/project/ticket/{{ticket.pk}}">{{ticket.subject}}</a>     </div>     <div id="ticket-number">         #{{ticket.pk}}     </div>     <div id="ticket-state">         {{ticket.get_state_display}}     </div>     <div id="ticket-info">         reported {{ticket.created_by}} | created: {{ticket.created_on   }} | modified: {{ticket.modified_on}}     </div> </div> </div> {% endfor %} </div>  {% endblock %} 

it seems try going this, , don't understand why. missing? much!

it says there no project object slug equal project_slug.

you should catch exception below

try:     project.objects.get(slug=project_slug) except project.doesnotexist:     raise sth...