Django模板/视图问题与旋转木马

Question

好的，所以这就是这笔交易：

这是我目前正在做的事情：

看到顶部的两个箭头？这应该是图片旋转木马的地方。但是，此转盘中没有图片。也就是说，直到我点击上传＆＃39;按钮。

所以，我的目标是在我点击“上传”之前让图片显示在第一页上。按钮。

如何解决此问题？

我的代码：

的index.html

{% extends 'webportal/defaults.html' %}
{% block body %}
    {% include 'webportal/carousel.html' %}

    <br/>
    <div class="container">
        <div class="row">
            <div class="col-md-12">
                <p> So far we have been able to establish what the user tables will be have created or are in process of
                    creating
                    the ability to create, update, destroy users.</p>
            </div>
        </div>
        <div class="row">
            <div class="col-md-12">
                <p> For now this ability is limited to the main user table, however the models will be easily extended
                    to other
                    tables as they are needed</p>
            </div>
        </div>
        <div class="row">
            <div class="col-md-12">
                <p> Also not a lot of thought has gone into styling yet, we know that the page is suppose to resemble
                    the parent
                    organizations page. Right now we have been more focused on getting each individual component
                    working. Later we
                    will merge them into a whole. </p>
            </div>
        </div>
    </div>


    {% include 'webportal/info_row.html' with one=one two=two three=three %}
{% endblock %}

Carousel.html：

{% load staticfiles %}
{% load filename %}

<div class="container">
    <div class="row">
        <div class="col-md-12">
            <div id="myCarousel" class="carousel slide" data-ride="carousel">
                <div class="carousel-inner" role="listbox">
                    {% for document in documents %}
                        <div class="item {% if forloop.first %} active {% endif %}">
                           <div class="row">
                             <div class="col">
                               <li><a href = "{{document.docfile.url}}">{{document.docfile.name}}</a></li>
                               <img src = "{{STATIC_URL}}img/{{document|filename}}" >
                               <p align="center"><form style="text-align:center" action="{% url 'webportal:delete' %}" method="post" enctype="multipart/form-data">
                                   {% csrf_token %}
                                   <p>{{ form.non_field_errors }}</p>
                                   <p>{{ form.Document.label_tag }} {{ form.Document.help_text }}</p>
                                   <p>
                                       {{ form.Document.errors }}
                                       {{ form.Document.docfile }}
                                   </p>
                                   <p><input type="submit" value="Delete" /></p>
                               </form></p>
                             </div>
                           </div>
                         </div>
                    {% endfor %}
                </div>
                <a class="left carousel-control" href="#myCarousel" role="button" data-slide="prev">
                    <span class="glyphicon glyphicon-chevron-left"></span>
                    <span class="sr-only">Previous</span>
                </a>
                <a class="right carousel-control" href="#myCarousel" role="button" data-slide="next">
                    <span class="glyphicon glyphicon-chevron-right"></span>
                    <span class="sr-only">Next</span>
                </a>
            </div>
            <!-- /.carousel -->
        </div>
    </div>
    <form action="{% url 'webportal:carousel' %}" method="post" enctype="multipart/form-data">
        {% csrf_token %}
        <p>{{ form.non_field_errors }}</p>
        <p>{{ form.docfile.label_tag }} {{ form.docfile.help_text }}</p>
        <p>
            {{ form.docfile.errors }}
            {{ form.docfile }}
        </p>
        <p><input type="submit" value="Upload" /></p>
    </form>
</div>

Views.py：

from django.shortcuts import render
from django.shortcuts import render, redirect, get_object_or_404
from django.contrib.auth import authenticate, login
from webportal.views.authentication import LoginForm
from django.shortcuts import render_to_response
from django.template import RequestContext
from django.http import HttpResponseRedirect
from django.http import HttpResponse
from django.core.urlresolvers import reverse
from django.conf import settings
from webportal.forms.forms import DocumentForm
from webportal.models import Document, DeleteForm
is_server = True
def delete(request, my_id):
    Deleted=get_object_or_404(Document, docfile=my_id)
    if request.method=='POST':
        form=DeleteForm(request.POST, instance=Deleted)
        if form.is_valid():
            Deleted.delete()
            return HttpResponseRedirect('http://127.0.0.1:8000/alzheimers/')
    else:
        form=DeleteForm(instance=Deleted)
    return render_to_response(
        'webportal/index.html',
        {'documents': documents, 'form': form,},
        context_instance=RequestContext(request)
    )

# Redirect to the document list after POST
def carousel(request):
    # Handle file upload
    if request.method == 'POST':
        form = DocumentForm(request.POST, request.FILES)
        if form.is_valid():
            newdoc = Document(docfile = request.FILES['docfile'])
            newdoc.save()

            # Redirect to the document list after POST
            return HttpResponseRedirect('http://127.0.0.1:8000/alzheimers/')
   else:
       form = DocumentForm() # A empty, unbound form
# Load documents for the list page
   documents = Document.objects.all()
#documents=DocumentForm().
# Render list page with the documents and the form
   return render_to_response(
    'webportal/index.html',
    {'documents': documents, 'form': form,},
    context_instance=RequestContext(request)
)

Models.py：

class Document(models.Model):
    docfile = models.ImageField(upload_to='webportal/static/img/')
class DeleteForm(ModelForm):
    class Meta:
        model=Document
        fields=[]

Forms.py：

class DocumentForm(forms.Form):
    docfile = forms.ImageField(label='Select a file', help_text='max. 42 megabytes')

如果我想要做的事情是不可能的，我不会感到惊讶。如果有办法做到这一点，它是否涉及Ajax？

Answer 1

.py文件是Python代码。 In Python, leading whitespace matters

在 Views.py 中，carousel函数不包含有效的Python代码：

def carousel(request):
    # Handle file upload
    if request.method == 'POST':
        form = DocumentForm(request.POST, request.FILES)
        if form.is_valid():
            newdoc = Document(docfile = request.FILES['docfile'])
            newdoc.save()

            # Redirect to the document list after POST
            return HttpResponseRedirect('http://127.0.0.1:8000/alzheimers/')
else:

 form = DocumentForm() # A empty, unbound form
# Load documents for the list page
documents = Document.objects.all()
#documents=DocumentForm().
# Render list page with the documents and the form
return render_to_response(
    'webportal/index.html',
    {'documents': documents, 'form': form,},
    context_instance=RequestContext(request)
)

相反，它应该是：

def carousel(request):
    # Handle file upload
    if request.method == 'POST':
        form = DocumentForm(request.POST, request.FILES)
        if form.is_valid():
            newdoc = Document(docfile = request.FILES['docfile'])
            newdoc.save()

            # Redirect to the document list after POST
            return HttpResponseRedirect('http://127.0.0.1:8000/alzheimers/')

    else:

        form = DocumentForm() # A empty, unbound form
        # Load documents for the list page
        documents = Document.objects.all()
        #documents=DocumentForm().
        # Render list page with the documents and the form
        return render_to_response(
            'webportal/index.html',
            {'documents': documents, 'form': form,},
            context_instance=RequestContext(request)
        )

但不清楚else部分是属于第一个还是第二个if构造。