django - 在模板中显示上传的图像 - Django

Question

我正在尝试将上传的图像显示到我想象的蔬菜目录的模板中。

我有一个页面到 add a new vegetable and upload images .主模板是蔬菜列表，稍后会有缩略图。

现在，在查看蔬菜的详细信息页面时，我想显示其图像，但模板仅显示字符串“VegetableImage Object”代替图像，即使带有 img 标签。

我很困惑，因为模板显然已经找到了图像，但它们仅作为通用字符串显示。

模型.py

class Vegetable(models.Model):
        title = models.CharField(max_length=0)
        category = models.CharField(max_length=50,
                                    choices=CATEGORY_CHOICES)
        thumbnail = models.ImageField(upload_to = 'uploaded_images/')


class VegetableImage(models.Model):
    vegetable = models.ForeignKey(Vegetable, default=None, related_name='images')
    image = models.ImageField(upload_to='images/vegetable',
                             verbose_name='image',)

主模板 View (所有蔬菜的列表)和详细 View

class VegetableView(generic.ListView):
    template_name = 'vegetable/vegetable.html'
    context_object_name = 'vegetable_list'

    def get_queryset(self):
        return Vegetable.objects.all()

class DetailView(generic.DetailView):
    model = Vegetable
    template_name = 'vegetable/detail.html'

显示蔬菜细节的细节模板

{% if view %}
    <h1>Title: {{ vegetable.title }}</h1>
    <h2>Category: {{ vegetable.category }}</h2>
    <p>Thumbnail: {{ vegetable.thumbnail }}</p>
    <p>Images:     
{% for vegetable in vegetable.images.all %}
    {{ vegetable }}
    {% endfor %}
</p>


{% else %}
    <p> no vegetables found - error </p>
{% endif %}

Answer 1

尝试在模板中使用以下代码显示图像:

<img src="{{ vegetable.image.url }}" alt="...">

这是您从 imagefield 对象访问 url 的方式。

更多技术细节， ImageField 继承自 FileField .照原样 stated在文档中:

When you access a FileField on a model, you are given an instance of FieldFile as a proxy for accessing the underlying file...

所以:

FieldFile.url

A read-only property to access the file’s relative URL by calling the url() method of the underlying Storage class.

致 display uploaded user files in development您需要更改网址。