Question

我是django的新手。

我有一个看起来像这样的模型：

models.py

class Intervention(models.Model):
subject = models.CharField(max_length=200)
begin_date = models.DateField(default=datetime.datetime.today)
end_date = models.DateField(default=datetime.datetime.today)
description = models.TextField(blank=True)
speaker = models.ForeignKey(CustomUser, on_delete=models.CASCADE)
campus = models.ForeignKey(Campus, on_delete=models.CASCADE)

class Meta:
    verbose_name = 'Intervention'
    verbose_name_plural = 'Interventions'

def __str__(self):
    return self.subject

class Evaluation(models.Model):
interventions = models.ForeignKey(Intervention, on_delete=models.CASCADE)
student_id = models.CharField(max_length=20)
speaker_knowledge_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
speaker_teaching_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
speaker_answer_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
slide_content_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
slide_examples_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
comment = models.TextField(blank=True)

想法是，当学生进入主页上的网站时，他必须选择他要学习的校园，然后将他重定向到一个页面，在该页面上他只能看到其校园的干预措施，然后当他选择干预措施时，他可以获得详细信息其中：

Home page screen

Interventions page

Intervetion detail page

到目前为止，一切正常。现在，在“干预详细信息页面”上，当用户单击“给定标记”时，他将被重定向到页面以创建标记（我使用基于CreateView类的标记），如下所示：

create mark

现在我的问题是，如何用学生要打分的干预pk替换生成的表格中的Modelchoicefield？

Views.py

class CreateEvaluationView(CreateView):
form_class = NewEvaluation
template_name = 'mark.html'
def home(request):
   campus = Campus.objects.all().order_by('-name')
return render(request, 'home.html', {'campus': campus})

def mark(request):
if request.method == 'POST':
    campus = request.POST.get('campus')
    intervention = Intervention.objects.filter(campus=campus)
    return render(request, 'mark.html', {'intervention': intervention})

def intervention_detail(request, pk):
intervention_detail = get_object_or_404(Intervention, pk=pk)
return render(request, 'intervention_detail.html', {'intervention_detail': intervention_detail})

urls.py

    path('', views.home, name='home'),
path('mark/', views.mark, name='mark'),
path('mark/<int:pk>/', views.intervention_detail, name='intervention_detail'),
path('mark/create/', CreateEvaluationView.as_view(template_name="givemark.html"), name='newmark'),
path('intervention/create/', login_required(CreateInterventionView.as_view(template_name="intervention_create.html")), name='create'),
path('intervention/', login_required(ListInterventionView.as_view(template_name="intervention_list.html")), name='list'),

预先感谢您的帮助！不好意思。

Answer 1

您需要在表单中提供Intervention个pk。最简单的解决方案是将其传递给url：

path('mark/create/<int:intervention_pk>', CreateEvaluationView.as_view(template_name="givemark.html"), name='newmark'),

需要修改模板才能通过干预pk，例如reverse('newmark', intervention_pk=intervention.pk)

从您的表单中排除干预pk，因此您的用户将无法意外地对其进行修改。

class NewEvaluation(forms.ModelForm):
    class Meta:
        model = Evaluation
        exclude = ('interventions',)

在保存表单之前立即设置干预pk：

class CreateEvaluationView(CreateView):
    form_class = NewEvaluation
    template_name = 'mark.html'

    def form_valid(self, form):
        intervention = Intervention.objects.get(pk=self.kwargs['intervention_pk'])
        self.object = form.save(commit=False)
        self.object.interventions = intervention
        self.object.save()

将pk传递给Django中的CreateView表单

1 个答案: