这是我的代码 views.py

def search(request):
    if request.method == 'GET':
        try:
            q = request.GET.get('search_box',None)
            posts = Listing.objects.filter(title__contains=q,is_live=1) | \
                    Listing.objects.filter(street_address__contains=q,is_live=1) | \
                    Listing.objects.filter(city__contains=q,is_live=1) | \
                    Listing.objects.filter(state=q,is_live=1) | \
                    Listing.objects.filter(property_class__contains=q,is_live=1) | \
                    Listing.objects.filter(sale_or_lease__contains=q,is_live=1)
            return render_to_response('search/results.html',{'posts': posts,'q': q})
        except KeyError:
            return redirect('home')

results.html：

<div class="container" style="width:20%; float:right; text-align:center; overflow:auto;">
            {% for Listing in posts %}
                <a href="{% url 'post_view' Listing.pk %}"><img style="width: 384px; height: 216px;" alt="Thumbnail"
                                                                src="{{ MEDIA_URL }}{{ Listing.thumbnail }}"/></a>
                <p style="color:black;">{{ Listing.title }}</p>
                <p style="color:black;">Sale or Lease: {{ Listing.sale_or_lease }}</p>
                <p style="color:black;">Class: {{ Listing.property_class }}</p>
                <p style="color:black;">Square Feet: {{ Listing.square_feet }}</p>
                {% if Listing.price %}
                    <p style="color:black;">Price: ${{ Listing.price|linebreaksbr }}</p>
                {% endif %}
                {% if Listing.price_per_square_foot_per_year %}
                    <p style="color:black;">Price per SqFt/yr:
                        ${{ Listing.price_per_square_foot_per_year|linebreaksbr }}</p>
                {% endif %}
                <p style="color:black;"> City: {{ Listing.city }},{{ Listing.state }}</p>
                <hr>
            {% endfor %}
        </div>

对于上述代码，不输出Listing.thumbnail，仅占位符文本。这是我正在使用的代码示例。

views.py

def preview(request,pk):
    posts = Listing.objects.all().filter(is_live=1)
    preview = get_object_or_404(Listing,pk=pk)
    attorneys = Attorneys.objects.all().filter(state=preview.state) | \
                Attorneys.objects.all().filter(city=preview.city)
    lenders = Lenders.objects.all().filter(state=preview.state) | \
              Lenders.objects.all().filter(city=preview.city)
    developers = Developers.objects.all().filter(state=preview.state) | \
                 Developers.objects.all().filter(city=preview.city)
    context = {'posts': posts,'preview': preview,'pk': preview.pk,'attorneys': attorneys,'lenders': lenders,'developers': developers}
    return render(request,'preview.html',context)

preview.html

<div class="container" style="width:20%; float:right; text-align:center;">
            <a href="{% url 'post_view' pk %}"><img style="width: 384px; height: 216px;" alt="Thumbnail"
                                                    src="{{ MEDIA_URL }}{{ preview.thumbnail }}"/></a>
            <p style="color:black;">{{ preview.title }}</p>
            <p style="color:black;">Sale or Lease: {{ preview.sale_or_lease }}</p>
            <p style="color:black;">Class: {{ preview.property_class }}</p>
            <p style="color:black;">Square Feet: {{ preview.square_feet }}</p>
            {% if preview.price %}
                <p style="color:black;">Price: ${{ preview.price }}</p>
            {% endif %}
            {% if preview.price_per_square_foot_per_year %}
                <p>Price per SqFt/yr: ${{ preview.price_per_square_foot_per_year }}</p>
            {% endif %}
            <p style="color:black;"> City: {{ preview.city }},{{ preview.state }}</p>

            ...

</div>

感谢任何帮助，我认为它可能与render_to_response有关，但我不确定。