[英]How do I access images uploaded through a formset in Django?
我似乎找不到一种方法来遍历表单集上载的文件,尽管文件已按照代码指示进行了上载。
当我加载页面时,它显示1-3个“ img src =(unkown)”标签。 上传2张图片时显示3,上传1张图片时显示1。
模板视图:
{% block body %}
<div class="container">
<div class="col-md-8">
<p>
<h1>{{ post.title }}</h1>
<h4>{{ post.body }}</h4>
<p>
Posted by {{ post.user }} on {{ post.created_date }}
{% if not post.created_date == post.updated_date %}
and updated on {{ post.updated_date }}
{% endif %}
</p>
</p>
{% for img in images %}
<img src="{{ img.url }}" width=360>
{{ img.url }}
<br>
{% endfor %}
</div>
<div class="col-4-md">
{% if post.cover_image %}
<img src="{{ post.cover_image.url }}" width=240>
{% endif %}
</div>
</div>
{% endblock %}
在这里,我使用过滤器而不是获取,因此它应该给我列出通过Foreignkey连接到正确帖子的图像列表。 此处的帖子将按原样显示,并附带帖子中的内部封面图像和文字。
查看观点:
class ViewPost(TemplateView):
template_name = 'posts/view_post.html'
context_object_name = 'view_post'
def get(self, request, pk):
post = Post.objects.get(pk=pk)
images = Images.objects.filter(post=post)
args = {'post': post, 'images': images}
return render(request, self.template_name, args)
模板制作:
{% block body %}
<div class="container">
<div class="col-md-8">
<form method="post" enctype="multipart/form-data">
{% csrf_token %}
{{ form.as_p }}
{{ form.errors }}
{% csrf_token %}
{{ formset.management_form }}
{% for form in formset %}
{{ form }}
{% endfor %}
<button type="submit">Submit</button>
</form>
</div>
</div>
{% endblock %}
查看制作发布:
class MakePost(DetailView):
template_name = 'posts/make_post.html'
ImageFormSet = modelformset_factory(Images, form=ImageForm, extra=3)
def get(self, request):
form = PostForm()
formset = self.ImageFormSet(queryset=Images.objects.none())
args = {'form': form, 'formset': formset}
return render(request, self.template_name, args)
def post(self, request):
form = PostForm(request.POST, request.FILES)
formset = self.ImageFormSet(request.POST, request.FILES,
queryset=Images.objects.none())
if form.is_valid() and formset.is_valid():
post = form.save(commit=False)
post.user = request.user
post.cover_image = form.cleaned_data['cover_image']
post.title = form.cleaned_data['title']
post.body = form.cleaned_data['body']
post.save()
for imgform in formset:
image = imgform.cleaned_data.get('image')
photo = Images(post=post, post_image=image)
photo.save()
return redirect('home_space:home')
else:
return redirect('home_space:home')
命名文件和图像模型的功能:
def get_image_filename(instance, filename):
title = instance.post.title
slug = slugify(title)
return "post_images/%s-%s" % (slug, filename)
class Images(models.Model):
post = models.ForeignKey(Post, default=None, on_delete=models.CASCADE)
post_image = models.ImageField(upload_to=get_image_filename,
verbose_name='Image')
在您的模板中,您正在访问Images
模型实例的url
。 但是, url
属性位于ImageField
类实例中。 使用img.post_image.url
。
范例 :
{% for img in images %}
<img src="{{ img.post_image.url }}" width=360>
{{ img.post_image.url }}
<br>
{% endfor %}
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