Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
249 views
in Technique[技术] by (71.8m points)

python - django how to following relationships backwards?

I am having some issue with following relationships backwards. From the parent page i want to be able to see what children belong to that parent. Heres what i got so far

model.py

class Parents(models.Model):
        name = models.CharField()

class Child(models.Model):
    parent = models.ForeignKey(Parent, related_name='children')
    child_name = models.CharField()

views.py

def parents(request):
    return render_to_response('dashboard/parent.html', {'parents': Parents.objects.all() })

parent.html

{% for parent in parents %}

            <tr>
                <td><a href="/parent/get/{{ parent.id }}/">{{ parent.id }}</a></td>
                <td><a href="/parent/get/{{ parent.id }}/">{{ parant.name }}</a></td>
                <td><a href="/parent/get/{{ parent.id }}/">{{ parent.children.child_name }}</a></td>
            </tr>

            {% endfor %}

            </tbody>
        </table>
    </div>
{% endblock %}
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

As Daniel Roseman mentioned you possibily have more than one child per parent, thus you have to get the whole set of children and iterate over it.

You can get this set with: parent.children_set.all()


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...