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を私は新しいPostオブジェクトを作成しようとしていた場合、Pythonは次のエラーを吐き出す：ここジャンゴUNIQUE制約が失敗しました：webapp_post.slug
UNIQUE constraint failed: webapp_post.slug
は私のmodels.pyは
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)
ですここに私のviews.pyは、Djangoはデータベースがあるため、あなたのPostデータを保存しないことを報告している
@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))