将图像上传到轮播的问题 [重复]

Question

好的，这就是交易：

这是我目前正在做的事情：

看到顶部的两个箭头了吗？那就是图片轮播的地方。但是，此轮播中没有图片。也就是说，直到我点击“上传”按钮。

所以，我的目标是在我点击“上传”按钮之前让图片出现在第一页。

我该如何解决这个问题？我是Django 的菜鸟，写这段代码就像拔牙一样。

我的代码：

索引.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 %}

轮播.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)
)

模型.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')

URls.py：

from django.conf.urls import patterns, url 

from webportal.views import views, register, authentication, welcome, search, profile, event, csv_export, role_creation, \ 
    edit_event, reports, accounts 



urlpatterns = patterns('', 
                       url(r'^reports', reports.report_page), 
                       url(r'^search/criteria', search.get_criteria), 
                       url(r'^search', search.search_page), 
                       url(r'^register', register.SignUpView.as_view(), name="register"), 
                       url(r'^login', authentication.login_view, name="login"), 
                       url(r'^carousel', views.carousel, name="carousel"), 
                       url(r'^delete', views.delete, name="delete"),  
                       url(r'^profile', profile.ProfileView.as_view(), name="profile"), 
                       url(r'^welcome', welcome.WelcomeView.as_view(), name="welcome"), 

                       url(r'^event/creation', event.Creation.as_view(), name="event_creation"), 
                       # url(r'^role_creation', role_creation.Creation.as_view(), name="role_creation"), 
                       url(r'^csv_export', csv_export.CSVExport.as_view(), name="csv_export"), 
                       url(r'^csv_import', reports.upload_file, name="csv_import"), 
                       url(r'^logout$', 'django.contrib.auth.views.logout', {'next_page': '/alzheimers/'}), 
                       url(r'^edit_event', edit_event.EditView.as_view(), name='edit_event'), 
                       url(r'^parse_ajax', profile.parse_ajax), 
                       url(r'^event/role_ajax', role_creation.ajax), 
                       url(r'^event/all', event.view_all), 
                       url(r'^event/information', event.ajax), 
                       url(r'^accounts/personal', accounts.personal), 
                       url(r'^accounts/create', accounts.create), 
                       url(r'^accounts/edit', accounts.edit), 
                       url(r'^accounts/remove', accounts.remove), 
                       url(r'^$', views.bootstrap), 
)

如果有办法做到这一点，它是否涉及ajax？由于缺乏足够的答案，我再次问了这个问题。

Answer 1

您应该将documents 上下文变量传递给处理/alzheimers/ 页面的视图中的模板。

更新：您应该更改的视图是views.boostrap()。所以模板的渲染会是这样的：

def bootstrap(request):
   ...
   return render_to_response('webportal/bootstrap.html',
                             {'documents': Document.objects.all()},
                             context_instance=RequestContext(request)
   )