[英]Django NoReverseMatch error Reverse for 'detail' with arguments '('',)' and keyword arguments '{}' not found
[英]Django error : NoReverseMatch at /Post/8 Reverse for 'comments' with arguments '('',)' not found
我正在处理我的项目我遇到了“评论”问题:当用户单击“查看”按钮从主页查看帖子时,我添加了评论作为一个部分。
Django 错误:NoReverseMatch at /Post/8 Reverse for 'comments' with arguments '('',)' not found. 尝试了 1 个模式:['Post/(?P[0-9]+)$']
视图.py 文件
def viewList(request, id):
item = Post.objects.get(id=id)
context = {
'item': item,
'comment_form': comment(),
'comments': item.get_comments.all(),
}
return render(request, 'auctions/item.html', context)
@login_required
def comments(request, id):
listing = Post.objects.get(id=id)
form = comment(request.PSOT)
newComment = form.save(commit=False)
newComment.user = request.user
newComment.listing = listing
newComment.save()
return HttpResponseRedirect(reverse("listing", {'id': id}))
模型.py文件
class Post(models.Model):
# data fields
title = models.CharField(max_length=64)
textarea = models.TextField()
# bid
price = models.FloatField(default=0)
currentBid = models.FloatField(blank=True, null=True)
imageurl = models.CharField(max_length=255, null=True, blank=True)
category = models.ForeignKey(
Category, on_delete=models.CASCADE, default="No Category Yet!", null=True, blank=True)
creator = models.ForeignKey(User, on_delete=models.PROTECT)
watchers = models.ManyToManyField(
User, blank=True, related_name='watched_list')
date = models.DateTimeField(auto_now_add=True)
# for activated the Category
activate = models.BooleanField(default=True)
def __str__(self):
return f"{self.title} | {self.textarea} | {self.date.strftime('%B %d %Y')}"
class Comment(models.Model):
body = models.CharField(max_length=100)
createdDate = models.DateTimeField(default=timezone.now)
# link to the post model
auction = models.ForeignKey(
Post, on_delete=models.CASCADE, related_name="get_comments")
user = models.ForeignKey(User, on_delete=models.CASCADE)
status = models.BooleanField(default=True)
def __str__(self):
return self.createdDate.strftime('%B %d %Y')
HTML文件
<!-- Comments -->
<div class="comments">
<p>Add a comment:</p>
<div class="row">
<div class="col-6">
<form action="{% url 'comments' listing.id %}" method="post">
{% csrf_token %}
<div class="input-group">
{{ comment_form }}
</div>
<input type="submit" value="save" class="btn btn-outline-dark btn-sm m-1"/>
</form>
</div>
{% for comment in comments %}
<div class="col-4">
Comments:
<h4>Name: {{comment.user}}</h4>
<h4>Content: {{comment.body}}</h4>
<h4>Date: {{comment.createdDate}}</h4>
</div>
{% endfor %}
</div>
</div>
网址.py
from django.urls import path
from . import views
urlpatterns = [
path("", views.index, name="index"),
path("login", views.login_view, name="login"),
path("logout", views.logout_view, name="logout"),
path("register", views.register, name="register"),
path("category/", views.category, name="category"),
path("Post", views.createList, name="createList"),
#comment url
path("Post/<str:id>", views.viewList, name="viewList"),
path("Post/<int:id>", views.comments, name="comments"),
]
您将Post
对象作为item
传递给模板,因此您应该使用以下方法解析 URL:
<!-- use item not listing ↓ -->
<form action="{% url 'comments' item.id %}" method="post">
…
</form>
您创建评论的视图也有一些错误:您应该使用request.POST
,而不是request.PSOT
:
from django.shortcuts import redirect
@login_required
def comments(request, id):
if request.method == 'POST'
form = comment(request.POST, request.FILES)
if form.is_valid():
form.instance.user = request.user
form.instance.auction_id = id
form.save()
return redirect('viewList', id=id)
此外,您的comment
表单应继承自ModelForm
而不是Form
:
class comment(forms.ModelForm):
class Meta:
model = Comment
fields = ('content',)
widgets = {
'content': forms.Textarea(attrs={"class": "form-control"})
}
最后你的urls.py
有两个(完全)重叠模式,你应该使用不同的 URL 来添加给定的评论:
urlpatterns = [
# …
#comment url
path('Post/<int:id>', views.viewList, name='viewList'),
path('Post/<int:id>/add', views.comments, name='comments'),
]
注意:通常
Form
或ModelForm
以…Form
后缀结尾,以避免与模型的名称冲突,并明确我们正在使用form 。 因此,最好使用CommentForm
而不是。comment
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