我想用 django 为拍卖网站创建一个包含两个模型的详细信息页面，但一直收到 FieldError。我该如何纠正这个错误？
I want to create a details page with two models for an auction site with django but keep getting FieldError. How do I correct this error?
我正在创建一个类似 ebay 的拍卖网站，详细信息视图页面应该反映两个模型的详细信息。
其中一个模型包含current_bid的详细信息（这是在创建列表时创建的），还有第二个模型包含new_bids（这是用户想要的地方购买商品可以输入他们的出价）。
我遇到的问题是如何将两个模型放入我的详细信息视图中，以及您是否可以确认我当前找出最高出价的逻辑（无论是否正确）。
MODELS.PY
class Auction(models.Model):
ABSTRACT = 'AB'
MODERN = 'MN'
ILLUSTRATION = 'IN'
select_category = [
('ABSTRACT', 'Abstract'),
('MODERN', 'Modern'),
('ILLUSTRATION', 'Illustration')
]
title = models.CharField(max_length=25)
description = models.TextField()
current_bid = models.IntegerField(null=False, blank=False)
image_url = models.URLField(verbose_name="URL", max_length=255, unique=True, null=True, blank=True)
category = models.CharField(
choices=select_category,
max_length=12,
default=MODERN,
null=True, blank=True
)
created_at = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.title
class Meta:
ordering = ['-created_at']
class Bids(models.Model):
auction = models.ForeignKey(Auction, on_delete=models.CASCADE, related_name='bidding')
user = models.ForeignKey(User, on_delete=models.PROTECT, related_name='bidding')
new_bid = models.DecimalField(max_digits=8, decimal_places=2)
# new_bid = MoneyField(max_digits=10, decimal_places=2, null=False, blank=False, default_currency='USD', default=0)
done_at = models.DateTimeField(auto_now_add=True)
class Meta:
ordering = ['auction', '-new_bid']
FORMS.PY
class AuctionForm(forms.ModelForm):
class Meta:
model = Auction
fields = ['title', 'description', 'current_bid', 'image_url', 'category']
class BidForm(forms.ModelForm):
class Meta:
model = Bids
fields = ['new_bid']
labels = {
'new_bid': ('Choose your maximum bid'),
}
VIEWS.PY
def listing_detail(request, listing_id):
detail = get_object_or_404(Auction, pk=listing_id)
if detail == None:
messages.add_message(request, messages.ERROR, "This is not available")
return HttpResponseRedirect(reverse("index"))
bid_queryset = Bids.objects.filter(detail=listing_id).order_by('new_bid').first()
if bid_queryset == None:
bid = detail.current_bid
else:
bid = bid_queryset.new_bid
context = {'detail': detail}
return render(request, 'auctions/details.html', context)
@login_required
def make_bid(request, listing_id):
bid_item = get_object_or_404(Bids, pk=listing_id)
each_listing = Auction.objects.get(pk=listing_id)
try:
highest_bid = each_listing.bidding.order_by('-new_bid')[0]
except Bids.DoesNotExist:
highest_bid = 0
if request.method == 'POST':
form = BidForm(request.POST)
if form.is_valid:
if form['bidding'] > highest_bid:
bidding = form.save()
messages.add_message(request, messages.SUCCESS, "Your bid is currently the highest")
return HttpResponseRedirect(reverse("index"))
else:
messages.add_message(request, messages.ERROR, "Your bid must be higher than the previous bid")
else:
form = BidForm(initial={'each_listing': each_listing,
'user': request.user,
'amount': highest_bid})
return render(request, 'auctions/details.html', {'form': form})
DETAILS.HTML
<section>
<div class="row container">
<div class="col-sm-7 pr-5">
{% if detail.image_url %}
<img src='{{ detail.image_url }}' alt="{{ detail.title }}" style="width:100%">
{% else %}
<img src="https://demofree.sirv.com/nope-not-here.jpg">
{% endif %}
</div>
<div class="col-sm-5">
<div style="width: 30rem;">
<div>
<h5>{{ detail.title }}</h5>
<hr>
<p>{{ detail.description }}</p>
<hr>
<p>{{ detail.current_bid }}</p>
<hr>
<p>{{ detail.new_bid }}</p>
<hr>
<button class="btn btn-primary btn-block" >Place bid</button>
<button class="btn-block btn-outline-primary">Add to watchlist</button>
</div>
</div>
</div>
<form action="{% url 'auctions:listing_detail' listing.id %}" method="post">
{% csrf_token %}
{{form.as_p}}
<input type="submit" value="Submit">
</form>
现在，我收到这条错误消息
FieldError at /detail/15/
Cannot resolve keyword 'detail' into field. Choices are: auction, auction_id, done_at, id, new_bid, user, user_id
Traceback Switch to copy-and-paste view
C:\Users\USER\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\exception.py, line 47, in inner
response = get_response(request) …
Local vars
C:\Users\USER\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\base.py, line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs) …
Local vars
C:\Users\USER\Downloads\commerce\commerce\auctions\views.py, line 95, in listing_detail
bid_queryset = Bids.objects.filter(detail=listing_id).order_by('new_bid').first()
URLS.PY
urlpatterns = [
path("", views.index, name="index"),
path("create/", views.create_listing, name="create_listing"),
path("detail/<int:listing_id>/", views.listing_detail, name="listing_detail"),
path("bid/<int:listing_id>/", views.make_bid, name="bid"),
您应该在 listing_detail 视图中添加 pk 或 id 字段
试试这个：
def listing_detail(request, listing_id):
detail = get_object_or_404(Auction, pk=listing_id)
if detail == None:
messages.add_message(request, messages.ERROR, "This is not available")
return HttpResponseRedirect(reverse("index"))
bid_queryset = Bids.objects.filter(pk=listing_id).order_by('new_bid').first() # change here
if bid_queryset == None:
bid = detail.current_bid
else:
bid = bid_queryset.new_bid
注：
将此{% url 'auctions:bid' listing.id %}更改为{% url 'bid' listing.id %}
确保 listing.id 来自模板变量。
我正在创建一个类似 ebay 的拍卖网站，详细信息视图页面应该反映两个模型的详细信息。
其中一个模型包含current_bid的详细信息（这是在创建列表时创建的），还有第二个模型包含new_bids（这是用户想要的地方购买商品可以输入他们的出价）。
我遇到的问题是如何将两个模型放入我的详细信息视图中，以及您是否可以确认我当前找出最高出价的逻辑（无论是否正确）。
MODELS.PY
class Auction(models.Model):
ABSTRACT = 'AB'
MODERN = 'MN'
ILLUSTRATION = 'IN'
select_category = [
('ABSTRACT', 'Abstract'),
('MODERN', 'Modern'),
('ILLUSTRATION', 'Illustration')
]
title = models.CharField(max_length=25)
description = models.TextField()
current_bid = models.IntegerField(null=False, blank=False)
image_url = models.URLField(verbose_name="URL", max_length=255, unique=True, null=True, blank=True)
category = models.CharField(
choices=select_category,
max_length=12,
default=MODERN,
null=True, blank=True
)
created_at = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.title
class Meta:
ordering = ['-created_at']
class Bids(models.Model):
auction = models.ForeignKey(Auction, on_delete=models.CASCADE, related_name='bidding')
user = models.ForeignKey(User, on_delete=models.PROTECT, related_name='bidding')
new_bid = models.DecimalField(max_digits=8, decimal_places=2)
# new_bid = MoneyField(max_digits=10, decimal_places=2, null=False, blank=False, default_currency='USD', default=0)
done_at = models.DateTimeField(auto_now_add=True)
class Meta:
ordering = ['auction', '-new_bid']
FORMS.PY
class AuctionForm(forms.ModelForm):
class Meta:
model = Auction
fields = ['title', 'description', 'current_bid', 'image_url', 'category']
class BidForm(forms.ModelForm):
class Meta:
model = Bids
fields = ['new_bid']
labels = {
'new_bid': ('Choose your maximum bid'),
}
VIEWS.PY
def listing_detail(request, listing_id):
detail = get_object_or_404(Auction, pk=listing_id)
if detail == None:
messages.add_message(request, messages.ERROR, "This is not available")
return HttpResponseRedirect(reverse("index"))
bid_queryset = Bids.objects.filter(detail=listing_id).order_by('new_bid').first()
if bid_queryset == None:
bid = detail.current_bid
else:
bid = bid_queryset.new_bid
context = {'detail': detail}
return render(request, 'auctions/details.html', context)
@login_required
def make_bid(request, listing_id):
bid_item = get_object_or_404(Bids, pk=listing_id)
each_listing = Auction.objects.get(pk=listing_id)
try:
highest_bid = each_listing.bidding.order_by('-new_bid')[0]
except Bids.DoesNotExist:
highest_bid = 0
if request.method == 'POST':
form = BidForm(request.POST)
if form.is_valid:
if form['bidding'] > highest_bid:
bidding = form.save()
messages.add_message(request, messages.SUCCESS, "Your bid is currently the highest")
return HttpResponseRedirect(reverse("index"))
else:
messages.add_message(request, messages.ERROR, "Your bid must be higher than the previous bid")
else:
form = BidForm(initial={'each_listing': each_listing,
'user': request.user,
'amount': highest_bid})
return render(request, 'auctions/details.html', {'form': form})
DETAILS.HTML
<section>
<div class="row container">
<div class="col-sm-7 pr-5">
{% if detail.image_url %}
<img src='{{ detail.image_url }}' alt="{{ detail.title }}" style="width:100%">
{% else %}
<img src="https://demofree.sirv.com/nope-not-here.jpg">
{% endif %}
</div>
<div class="col-sm-5">
<div style="width: 30rem;">
<div>
<h5>{{ detail.title }}</h5>
<hr>
<p>{{ detail.description }}</p>
<hr>
<p>{{ detail.current_bid }}</p>
<hr>
<p>{{ detail.new_bid }}</p>
<hr>
<button class="btn btn-primary btn-block" >Place bid</button>
<button class="btn-block btn-outline-primary">Add to watchlist</button>
</div>
</div>
</div>
<form action="{% url 'auctions:listing_detail' listing.id %}" method="post">
{% csrf_token %}
{{form.as_p}}
<input type="submit" value="Submit">
</form>
现在，我收到这条错误消息
FieldError at /detail/15/
Cannot resolve keyword 'detail' into field. Choices are: auction, auction_id, done_at, id, new_bid, user, user_id
Traceback Switch to copy-and-paste view
C:\Users\USER\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\exception.py, line 47, in inner
response = get_response(request) …
Local vars
C:\Users\USER\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\base.py, line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs) …
Local vars
C:\Users\USER\Downloads\commerce\commerce\auctions\views.py, line 95, in listing_detail
bid_queryset = Bids.objects.filter(detail=listing_id).order_by('new_bid').first()
URLS.PY
urlpatterns = [
path("", views.index, name="index"),
path("create/", views.create_listing, name="create_listing"),
path("detail/<int:listing_id>/", views.listing_detail, name="listing_detail"),
path("bid/<int:listing_id>/", views.make_bid, name="bid"),
您应该在 listing_detail 视图中添加 pk 或 id 字段
试试这个：
def listing_detail(request, listing_id):
detail = get_object_or_404(Auction, pk=listing_id)
if detail == None:
messages.add_message(request, messages.ERROR, "This is not available")
return HttpResponseRedirect(reverse("index"))
bid_queryset = Bids.objects.filter(pk=listing_id).order_by('new_bid').first() # change here
if bid_queryset == None:
bid = detail.current_bid
else:
bid = bid_queryset.new_bid
注：
将此{% url 'auctions:bid' listing.id %}更改为{% url 'bid' listing.id %} 确保 listing.id 来自模板变量。