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django - 如何在 django 的详细视图上仅显示用户在外键中输入的相关数据

问题描述

我正在构建这个简单的测验应用程序。此应用程序允许所有用户以 Docx 格式提交作业的答案。每当用户在 DetailView 页面上查看问题时，如果用户已经提交了该分配的解决方案，那么该解决方案也应该显示在 DetailView 页面上。目前我得到的是所有用户提交的所有答案。我只想要用户在详细信息页面上对该作业的回答，这是我的模型。

class Assignment(models.Model):
    title = models.CharField(max_length=120)
    slug = models.SlugField(max_length=500)
    course = models.ForeignKey(Course, on_delete=models.CASCADE)
    class_or_level = models.ForeignKey(StudentClass, on_delete=models.CASCADE)
    teacher = models.ForeignKey(Teacher, on_delete=models.CASCADE)
    Text = models.TextField()
    date_added = models.DateTimeField(auto_now_add=True)
    date_expire = models.DateTimeField()

    def __str__(self):
        return self.title


class Answer(models.Model):
    slug = models.SlugField(max_length=500)
    assignment = models.ForeignKey(Assignment, on_delete=models.CASCADE)
    student = models.ForeignKey(User, on_delete=models.CASCADE)
    file = models.FileField(upload_to='assignment')
    date_added = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return '{} - {} '.format(self.assignment, self.student)

下面是我的看法

class AssignmentSubmitView(DetailView):
    model = Assignment
    template_name = 'assignment_submit.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['student_answer'] = self.object.answer_set.all()
        return context

下面是我在 detailview 模板上的过滤器。

{% for answer in student_answer %}
  {{ answer.file  }}
 {% endfor %}

标签： djangodjango-modelsdjango-formsdjango-viewsdjango-templates

解决方案

您首先需要知道访问该页面的用户，所以我假设您有一个用户模型和一个身份验证系统。

在视图中

class AssignmentSubmitView(DetailView):
    model = Assignment
    template_name = 'assignment_submit.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['student_answer'] = self.object.answer_set.filter()#then filter and get the answer specific to that user here (depending on your user and Assignment models)
        return context

并在您的模板中

{% if user.is_authenticated %}
    {% if student_answer %}
        {% for answer in student_answer %}
            {{ answer.file  }}
        {% endfor %}
    {% endif %}
{% endif %}

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