类通用 DeleteView 不适用于与模型相关的模型答案

【问题标题】：Class generic DeleteView not working for model related to model类通用 DeleteView 不适用于与模型相关的模型
【发布时间】：2019-10-14 17:05:40
【问题描述】：

我有一个包含作业问题的页面。与作业相关的问题显示在作业详细信息页面上，带有 EDIT 和 DELETE 锚标记。但是在按下删除后我得到一个错误：Reverse for 'CreateQuestion' with arguments '('',)' not found。尝试了 1 种模式：['assignment/(?P[0-9]+)/createQuestion/$']

views.py

class AssignmentDelete(DeleteView):
    model = Assignment
    template_name = "dashboard/assignment_list.html"
    success_url = reverse_lazy('ViewAssignment')
    def get(self, request, *args, **kwargs):
        return self.delete(request, *args, **kwargs)

class AssignmentDetailView(generic.DetailView):
    model = Assignment
    template_name = "dashboard/assignment_detail.html"

class QuestionDeleteView(DeleteView):
    model = Question
    template_name = 'dashboard/assignment_detail.html'
    def get_success_url(self):
        return reverse_lazy('assignment_detail', kwargs={'pk': self.object.assignment_id})

urls.py

path('<int:assignment_pk>/DeleteQuestion/<int:pk>/delete', views.QuestionDeleteView.as_view(), name='DeleteQuestion'),
path('<int:pk>/createQuestion/', views.QuestionCreate, name='CreateQuestion'),
path('assignment/<int:pk>', views.AssignmentDetailView.as_view(), name='assignment_detail'),

assignment_detail.html

{% extends "./base.html" %}
{% block content %}
  <h1>Course:{{assignment.course }}</h1>

  <p><strong>Assignment:</strong> {{ assignment.number }}</p> 
  <p><strong>publish_date:</strong> {{ assignment.publish_date }}</p>
  <p><strong>deadline:</strong> {{assignment.deadline_date}}</p>
  <div style="margin-left:20px;margin-top:20px">
    <h4>Questions</h4>
    <table class="table">
      <thead class="thead-light">
        <tr>
          <th scope="col">Question Title</th>
          <th scope="col">Question Marks</th>
          <th scope="col">Edit Question</th>
          <th scope="col">Delete Question</th>
        </tr>
      </thead>
      <tbody>
        {% for question in assignment.question_set.all %}
        <tr>
          <td>{{ question.title }}</td>
          <td>{{ question.marks }}</td>
          <td> <a href="{% url 'UpdateQuestion'  assignment.id question.id %}">Edit</a> </td>
          <td> <a onclick="return confirm('Are you sure?');" href="{% url 'DeleteQuestion'  assignment_pk=assignment.id pk=question.id %}">Delete</a></td>
        </tr>
      {% endfor %}
      </tbody>
    </table>

<a class=" btn btn-primary" href="{% url 'CreateQuestion' assignment.id %}">Add Question</a>
  </div>



{% endblock %}
{% block script %}

{% endblock %}

模型.py

class Assignment(models.Model):
    number = models.IntegerField()
    course = models.ForeignKey(Course,on_delete = models.SET_NULL,blank=True,null=True)
    publish_date = models.DateField(auto_now_add = True)
    deadline_date = models.DateField()
    faculty = models.ForeignKey(Faculty,on_delete = models.SET_NULL,blank=True,null=True)

    def __str__(self):
        return f'Assignment {self.number}-{self.course}'

    def get_absolute_url(self):
        """Returns the url to access a detail record for this Assignment."""
        return reverse('assignment-detail', args=[str(self.id)])
class Question(models.Model):
    assignment = models.ForeignKey(Assignment, on_delete=models.SET_NULL,blank=True,null=True)
    username = models.ForeignKey(User,on_delete=models.SET_NULL,blank=True,null=True)
    title = models.CharField(max_length = 200)
    description = models.TextField(blank=True , null = True)
    marks = models.IntegerField(null=True)
    date = models.DateTimeField(auto_now_add=True)
    def __str__(self):
        return self.title

    def get_absolute_url(self):
        """Returns the url to access a detail record for this book."""
        return reverse('question-detail', args=[str(self.id)])

The Assignment detail page with questions associated with it

【问题讨论】：

您需要显示作业详细信息模板的其余部分，尤其是带有 createQuestion 链接的部分。
请检查我是否更新了作业详情模板
我不确定我是否理解您在做什么。为什么要使用assignment_detail.html 删除问题视图？该视图应使用特定模板，该模板以表单形式显示确认消息，该表单回发给自身以执行删除。
我已经添加了截图，请检查。请帮助我，我厌倦了在这背后浪费了一整天。 Question.ForeignKey = Assignment.ForeignKey=Coursehas2Foreingkey(Grade , Department) （这是我的模型与每个 pther 的关系）
我不知道这与我的问题有什么关系。我已经可以看到模板，但您没有回答为什么将 同一个模板 分配给 DeleteView 的问题。

标签： django

【解决方案1】：

我对我的代码进行了一些更改并添加了一个 get 方法，现在它可以按我的意愿工作了。如果有人指出任何与此相关的风险，那就太好了。感谢大家花时间帮助解决我的问题

这是更新后的代码：

class QuestionDeleteView(DeleteView):
    model = Question
    template_name = "dashboard/assignment_detail.html"
   self.object.assignment_id})
    def get(self, request, *args, **kwargs):
        return self.delete(request, *args, **kwargs)
    def get_success_url(self):
        return reverse_lazy('assignment_detail', kwargs={'pk': self.object.assignment_id})

【讨论】：