Question

我有一个用户可以收藏并保存到自己帐户的帖子列表。但是，我一直收到上面的错误消息。有没有人知道问题出在哪里？

views.py：

def AircraftFavourite(request, id=None):
    instance = get_object_or_404(Aircraft, id=id)
    queryset = Aircraft.objects.all()
    context = {'all_aircraft' : queryset}
    try:
        selected_aircraft = context.all_aircraft.get(pk=request.POST['context'])
    except(KeyError, Aircraft.DoesNotExist):
        return render(request,'aircraft.html', {
            "aircraft" : instance,
            "error_message" : "You did not select a valid aircraft",
        })
    else:
        selected_aircraft.is_favorite = True
        selected_aircraft.save()
        return render(request,'aircraft.html', context)

urls.py

urlpatterns = [

  url(r'^detail/(?P<id>\d+)/$', AircraftDetail, name='AircraftDetail'),
  url(r'^(?P<id>\d+)/favourite/$', AircraftFavourite, name='AircraftFavourite'),]

aircraft.html

{% block content %}
  {% for a in all_aircraft %}
    <table>
      <tr>
        <th><a href="{% url 'AircraftDetail' id=a.id  %}"> {{ a.title }}</a>
        </th>
      </tr>
      <tr>
        <td>
          <form action="{% url 'AircraftFavourite' id=a.id  %}" method="post">
            {% csrf_token %}
            <input type="submit" id="aircraft{{ forloop.counter }}" name ="aircraft" value="{{ a.id  }}">
            <label for="aircraft{{ forloop.counter }}"
            {% if aircraft.is_favourite %}
              <img src="http://i.imgur.com/b9b13Rd.png" />
            {% endif %}
            <input type="submit" value="Favourite"><br>
          </form>
        </td>
      </tr>
  </table>


  {% endfor %}
{% endblock %}

Answer 1

在django模板中，属性访问和项目访问是等效的：

template.html

#rendered with context = dict(a=dict(something=5), b=SomeObject))
<body>
  {{ a.something }} vs {{ b.something }}
</body>

两者都有效，django会确定是否要访问该属性或获取该项目。

但是在Python中，使用.的属性访问不等同于使用方括号[ ]的项目访问权限。

您的脚本应该更改以反映这一点：

    try:
        selected_aircraft = context['all_aircraft'].get(pk=request.POST['context'])

或者理想情况下直接访问查询集，因此代码更能反映您正在做的事情：

    try:
        selected_aircraft = queryset.get(pk=request.POST['context'])

Answer 2

更改为：

selected_aircraft = get_object_or_404(Aircraft, id=request.POST['context'])

＆＃39;字典＆＃39;对象没有属性＆＃39; all_aircraft＆＃39;

2 个答案:

template.html