无法找出我的 jinja2/django 模板上的错误答案

【问题标题】：Can't figure out the error on my jinja2/django template无法找出我的 jinja2/django 模板上的错误
【发布时间】：2021-03-29 22:03:26
【问题描述】：

这是我的模板，if 语句不起作用！

{% extends "auctions/layout.html" %}    
{% block body %}    
{% if bid.name == User %}
<br>
<h1>You Won the auction</h1>
<br>
{% endif %}
<h1>Title: {{title}}</h1>
<br>    
<h1>Seller: {{listing.name}}</h1>
<br>    
<h1>Description: {{listing.description}}</h1>
<br>    
<h1>Category: {{listing.category}}</h1>
<br>    
<h1>price: {{bid.price}} by {{bid.name}}</h1>
<br>    
<form  action="{% url 'Bid' %}" method="post">
   {% csrf_token %}
   <input type="hidden" name="title" value="{{title}}">
   <input type="number" name="price">
   <input type="submit">
</form>
<form  action="{% url 'watchlist'%}" method="post">
   { % csrf_token %}
   Add to watchlist
   <input type="hidden" name="form_type" value="Watchlist">
   <input type="hidden" name="title" value="{{title}}">
   <input type="submit">
</form>
{% if User == "ilias" %}
<br>
<h1>Close the auction</h1>
<br>
<form  action="{% url 'close' %}" method="post">
   {% csrf_token %}
   <input type="hidden" name="title" value="{{title}}">
   <input type="submit">
</form>
<br>
{% endif %}
<form  action="{% url 'comment'%}" method="post">
   {% csrf_token %}
   <h1>Add comment</h1>
   <input type="text" name="content">
   <input type="hidden" name="title" value="{{title}}">
   <input type="submit">
</form>
{%for item in comments%}
<h3>{{item.content}} by {{item.name}}</h3>
<br>
{%endfor%}
{% endblock %}

这是我的意见.py

def listings(request, title):
    try:
        listing = Listing.objects.get(title=title)
    except:
        return HttpResponse('<h3>Page not found</h3>')
    else:
        title = listing.title
        name = listing.name
        comments = comment.objects.filter(title=title)
        bid = Bid.objects.get(title=title)
        User = request.user.username
        print name
        return render(request, 'auctions/listing.html', {
            'listing': listing,
            'title': title,
            'comments': comments,
            'bid': bid,
            'User': User,
            'name': name,
            })

我无法弄清楚错误在哪里。如何修复此错误以及如何避免此类错误？ Django版本：Django 3.1.1，Python版本：Python 3.8.5

如果您需要更多信息，请在 cmets 中问我！

它不显示 if 语句的内容！我不知道为什么。视图正在正确发送它检查过的数据！

【问题讨论】：

标签： python html python-3.x django jinja2

【解决方案1】：

修复了使它们成为两个字符串所需的错误

def listings(request, title):
    try:
        listing = Listing.objects.get(title=title) 
    except:
        return HttpResponse('<h3>Page not found</h3>')
    else:
        title = listing.title   
        name = str(listing.name)
        comments = comment.objects.filter(title=title)
        bid = Bid.objects.get(title=title)
        User = str(request.user.username)
        bidder = str(bid.name)
        print(name)
        return render(request, "auctions/listing.html", {   
            "listing":listing,
            "title":title,
            "comments":comments,
            "bid":bid,
            "User":User,
            "name":name,
            "bidder":bidder
        })

【讨论】：