Displaying uploaded images in the template - Django

问题

I am trying to display uploaded images to a template for my imaginary vegetable catalogue.

I have a page to add a new vegetable and upload images. The main template is a list of vegetables which will later have thumbnails.

Now, when viewing the detail page of the vegetable I want to display its images, but the template is only displaying the string 'VegetableImage Object' in place of an image, even with img tags.

I am confused because the template has obviously found the images but they are displayed just as a generic string.

models.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',)

view for main template (a list of all vegetables) and detail 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'

Detail template for displaying detail of vegetable

{% 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 %}

回答1:

Try to display the image using the following code in your template:

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

This is how you access the url from the imagefield object.

In more technical detail, ImageField inherits from FileField. As it is stated in the documentation:

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

Therefore:

FieldFile.url

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

To display uploaded user files in development you need to change the urls.

回答2:

You're trying to output the model itself, rather than the image field on the model.

You probably want to use a different variable name in your for loop, or it may get confusing later trying to work out what "vegetable" refers to.

Try

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


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

来源：https://stackoverflow.com/questions/32947795/displaying-uploaded-images-in-the-template-django