Wenn ich versuche, einen neuen Beitrag Objekt zu erstellen, spuckt Python die folgende Fehlermeldung aus:Django UNIQUE fehlgeschlagen: webapp_post.slug
UNIQUE constraint failed: webapp_post.slug
Hier ist meine models.py
class Post(models.Model):
title = models.CharField(max_length=200)
slug = models.SlugField(unique=True)
text = models.TextField()
created_on = models.DateTimeField(auto_now_add=True)
up_vote = 0 # num of up votes
down_vote = 0 #num of down votes
vote_total = up_vote - down_vote
author = models.ForeignKey('auth.User', null=True, blank=True)
CHOICES = [
('Hardware and OS', 'Hardware and OS'),
('Desktops', 'Desktops'),
('Tablets', 'Tablets'),
('Phones', 'Phones'),
('Wearables', 'Wearables'),
('Windows', 'Windows'),
('Mac OS X', 'Mac OS X'),
('Linux and Unix', 'Linux and Unix'),
('Programming and Computer Science', 'Programming and Computer Science'),
('Software Development', 'Software Development'),
('Web Development (Front)', 'Web Development (Front)'),
('Web Development (Back)', 'Web Development (Back)'),
('Mobile Development', 'Mobile Development'),
('Game Development', 'Game Development'),
('Algorithms and Data Structures', 'Algorithms and Data Structures'),
('Databases', 'Databases'),
('IDE/Text Editors', 'IDE/Text Editors'),
('Tutorial', 'Tutorial'),
('Opinion', 'Opinion'),
('Miscellaneous', 'Miscellaneous')
]
field = models.CharField(choices=CHOICES, max_length=200)
def __unicode__(self):
return self.title
@models.permalink
def get_absolute_url(self):
return ('blog_post_detail',(),
{
'slug' :self.slug,
})
def save(self, *args, **kwargs):
if not self.slug:
self.slug = slugify(self.title)
super(Post, self).save(*args, **kwargs)
hier ist meine views.py
@user_passes_test(lambda u: u.is_authenticated)
def add_post(request):
form = PostForm(request.POST or None)
if request.method == "POST":
if form.is_valid() and request.user.is_authenticated():
try:
post = form.save(commit=False)
post.author = request.user
post.save()
Post.objects.create(author=request.user, title=form.cleaned_data.get("title"), text=form.cleaned_data.get("text"))
return redirect(post)
except IntegrityError as e:
print(e)
else:
print("Invalid form")
print(form.errors)
return render_to_response('webapp/startthread.html',
{ 'form': form,
"authenticated": request.user.is_authenticated() },
context_instance=RequestContext(request))