CODEWITHSUNDEEP
django
user3621219
user3621219

Reputation: 41

Foreign key not available on object

Very very beginner question that puzzles me. I have problems showing the foreign key ArtWorkImages in my template, so i wanted to debug it in the view, but the foreign key ArtworkImage is not available on Artwork:

my model:

from django.db import models

class Artwork(models.Model):
    title = models.CharField(max_length=200)
    body = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True)

    def __unicode__(self):
        return self.title

class ArtworkImage(models.Model):
    property = models.ForeignKey(Artwork, related_name='images')
    image = models.ImageField(upload_to = "images/")

the view:

from django.shortcuts import render

from erikheide.models import Artwork
from erikheide.models import ArtworkImage

def index(request):
    artworks = Artwork.objects.all()[:5]

    artwork = artworks[0]

    images = artwork.artworkimage_set.all()

    context = {'latest_poll_list': artworks}
    return render(request, 'index.html', context)

the error:

> Traceback (most recent call last):   File
> "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py",
> line 115, in get_response
>     response = callback(request, *callback_args, **callback_kwargs)   File "/home/fhp/Hentede filer/tastypie/django15/erikheide/views.py",
> line 13, in index
>     images = artwork.artworkimage_set.all() AttributeError: 'Artwork' object has no attribute 'artworkimage_set'

The template that did not work (no images turn up)

{% if artworks %}
    <ul>
    {% for artwork in artworks %}
        <li><a href="{{ artwork.title }}/">{{ artwork.body}}</a></li>

        {% for image in artwork.images_set.all %}
        <img src="{{ image.image.url }}">

        {% endfor %}

    {% endfor %}
    </ul>
{% else %}
    <p>No artworks are available.</p>
{% endif %}

Upvotes: 3

Views: 64

Answers (2)

Dmitry Loparev
Dmitry Loparev

Reputation: 462

try 

artwork.images.all()

instead

artwork.artworkimage_set.all()

image_set is default name for RelatedManager. If related_name specified with foreign key RelatedManager name redefines.

Upvotes: 0

alecxe
alecxe

Reputation: 474211

You have defined a related_name on the ForeignKey field, you need to use it to follow the relationship.

Replace:

images = artwork.artworkimage_set.all()

with:

images = artwork.images.all()

Also see: What is `related_name` used for in Django?

Upvotes: 2

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