Django 重新组合奇怪的行为

Question

无论出于何种原因，我都无法在本地复制此问题，但是在我的模板之一中的生产服务器上，重新组合标签正在做一些奇怪的事情。我正在尝试将所有具有相同 pick_id 的捐赠分组，并仅显示“错过”了多少捐赠。出于某种原因，它在我的列表中不止一次显示相同的pickup_id。

看法

missed_routes = Donor.objects.filter(missed='YES').order_by('pickup_date')  

模板

{% block content %}
{% regroup missed_routes by pickup_id as missed_pickups %}

<div class="missedColumn">
    <h2>Missed Donations</h2>
    <p>Looks like we have some stragglers…</p>
    <p>These routes have missed donations in them.</p>
    {% for routes in missed_pickups %}

        <p><a href="/reschedule/{{ routes.grouper }}">{{ routes.list.0.route }}</a> - {{ routes.list.0.pickup_date }} ({{ routes.list|length }} missed - {{ routes.list.0.pickup_id }}</p>
    {% endfor %}
</div>

结果 html # 600 是pickup_id

        <p><a href="/reschedule/600">Syosset</a> - Sept. 14, 2012 (1 missed - 600</p>


        <p><a href="/reschedule/423">Huntington Station</a> - Sept. 14, 2012 (1 missed - 423</p>


        <p><a href="/reschedule/600">Syosset</a> - Sept. 14, 2012 (2 missed - 600</p>

在拾取 html 输出中迭代每个捐赠者时

        <p><a href="/reschedule/600">Syosset</a> - Sept. 14, 2012 (1 missed - 600
        <ul>

            <li>134170</li>

        </ul>
        </p>


        <p><a href="/reschedule/423">Huntington Station</a> - Sept. 14, 2012 (1 missed - 423
        <ul>

            <li>134938</li>

        </ul>
        </p>


        <p><a href="/reschedule/600">Syosset</a> - Sept. 14, 2012 (2 missed - 600
        <ul>

            <li>134174</li>

            <li>133151</li>

        </ul>

Answer 1

问题是 Django 的重组取决于您重组所依据的属性对列表进行排序。查看文档：

请注意， {% regroup %} 不会对其输入进行排序！我们的示例依赖于城市列表首先按国家排序的事实。如果城市列表没有按国家对其成员进行排序，则重组将天真地为一个国家显示多个组

因此，更改：

missed_routes = Donor.objects.filter(missed='YES').order_by('pickup_date')  

到

missed_routes = Donor.objects.filter(missed='YES').order_by('pickup_id')