How to use field from one model into other model while rendering a single view in Django

Question

Here is my model

class Gallery(models.Model):
    title = models.CharField(max_length=30)
    description = models.TextField(blank=True)
    featured_image = models.ImageField(upload_to="gallery")

    def __str__(self):
        return u'{}'.format(self.title)

class GalleryImage(models.Model):
    title = models.CharField(max_length=50, blank=True)
    description = models.TextField(blank=True)
    gallery = models.ForeignKey(Gallery)
    image = models.ImageField(upload_to="gallery")

    def __str__(self):
        return u'{}'.format(self.title)

Here is my view:

def gallery(request):
   galleries = Gallery.objects.all()
    return render(request, "gallery/home.html", {'galleries': galleries})


def gallery_section(request, gallery_id):
    gallery_images = GalleryImage.objects.filter(gallery_id=gallery_id)
    return render(request, "gallery/section.html",{'gimages': gallery_images})

I want to call featured_image field from gallery model and use it in section.html rendered file. Not able to get this why can't I access this field.

Template code in section.html:

.about{
  background-image: url({{ gallery.featured_image.url }});
  background-size: cover;
 }

Template code in home.html:

{% for gallery in galleries %}
    <a href="gallery/{{ gallery.id }}">
        <div class="col-lg-3 col-md-3 col-sm-3 col-xs-6 people-desc text-center">
            <img src="{{ gallery.featured_image.url }}" alt="" class="img-responsive people">
            <h4>{{ gallery.title }}</h4>
        </div>
    </a>
{% endfor %}

When clicked on a tag it takes me to section.html page but I want to use featured_image on that page too.

you're not passing `gallery` into context, is there some for loop and/or where template tag? — GwynBleidD, Sep 23 '15 at 12:53
You can use the HTML element `figure` and use the element `caption` within, instead of creating a `div` with an `img` and `h4` inside. — cezar, Sep 23 '15 at 13:05

score 1 · Accepted Answer · answered Sep 23 '15 at 13:11

If you want to use Gallery object in view gallery_section, you must pass that object into your template:

def gallery_section(request, gallery_id):
    gallery = Gallery.objects.get(id=gallery_id)
    gallery_images = GalleryImage.objects.filter(gallery_id=gallery_id)
    return render(request, "gallery/section.html",{'gimages': gallery_images, 'gallery': gallery})

It won't appear automatically or magically in your template. If you're using it when looping over images, you can also do:

{% for image in gimages %}
    {% image.gallery.featured_image.url %}
{% endfor %}

but for use outside that loop, you must pass image to your template to get it.

First code snippet is for that, if you don't want to use gallery outside of that loop, you don't need to change anything in your views, just access it properly in template. — GwynBleidD, Sep 23 '15 at 14:35

How to use field from one model into other model while rendering a single view in Django

1 Answers1