django如何向后追踪关系？ [英] django how to following relationships backwards?

问题描述

我有一些问题，以下关系向后。从父母页面我想能看到孩子属于那个父母。感谢我到目前为止

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

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 %}

推荐答案

Roseman提到你可能每个父母有一个以上的孩子，所以你必须得到整个孩子，并重复一遍。

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.

你可以得到这个设置： code> parent.children_set.all（）

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

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