Django：子模型字段不渲染答案

【问题标题】：Django:Child Model Fields Not RenderingDjango：子模型字段不渲染
【发布时间】：2020-09-02 11:50:39
【问题描述】：

所有外键、布尔值和选项字段都未在表单模板上呈现。但它们的标签标签正在呈现。例如：这是学校系统的“生成时间表”模型。型号

class GT(models.Model):
        timetable_id = models.CharField(primary_key=True,max_length=200)
        period_number = models.ForeignKey(Ref_Period,on_delete=models.CASCADE)
        scheduled_date_and_time = models.ForeignKey(Ref_Calendar,on_delete=models.CASCADE)
        schedule_id = models.ForeignKey(Planned_Timetable,on_delete=models.CASCADE)
        subject = models.ForeignKey(Ref_Subject,on_delete=models.CASCADE)
        teacher_id = models.ForeignKey(Teacher,on_delete=models.CASCADE)

        def __str__(self):
            return str(self.teacher_id)

我已经在 forms.py 文件中导入了 forms.py

class GTForm(ModelForm):
    class Meta:
        model = GT
        fields = '__all__'

查看：

@login_required(login_url = 'main:loginPage')
@allowed_users(allowed_roles=['admin'])

def dalltt(request):

    gtform = GTForm()

    if request.method == "POST":
         gtform = GTForm(request.POST)
         print(gtform)
         if gtform.is_valid():
             gtform.save()
             print("saved")
             return redirect('/')
         else:
            print(gtform.errors)

    print(gtform)
    context = {'gtform':gtform}
    return render(request=request,template_name="main/dalltimetable.html",context=context)

模板（dalltimetable.html）：

<form enctype="multipart/form-data" action="" method="POST" >
    {% csrf_token %}

    <table>
        <tr>
            <th>ID</th>
            <th>Time</th>
            <th>Day</th>
            <th>Subject</th>
            <th>{{ gtform.teacher_id.label_tag }} </th>

        </tr>
        <tr>
            <td>{{ gtform.teacher_id }} </td>
            <td>{{ gtform.teacher_id }}</td>


        </tr>
    </table>




    <input class="btn btn-warning" type="submit" value="Update">
    {{ form.name.errors }}
{{ form.non_field_errors }}
</form>

【问题讨论】：

标签： python django forms model render

【解决方案1】：

试试看：

@login_required(login_url = 'main:loginPage')
@allowed_users(allowed_roles=['admin'])
def dalltt(request):
    if request.method == "POST":
         gtform = GTForm(request.POST)
         print(gtform)
         if gtform.is_valid():
             gtform.save()
             print("saved")
             return redirect('/')
         else:
            print(gtform.errors)
    else:
        gtform = GTForm()

    return render(request, 'main/dalltimetable.html', {'gtform': gtform })

也可以尝试切换到基于类的视图来帮助样板：

class dalltt(LoginRequiredMixin, FormView):
    template_name = 'main/dalltimetable.html'
    form_class = GTForm
    success_url = '/'
    login_url = 'main:loginPage'

    def form_valid(self, form):
        form.save()
        return super().form_valid(form)

    def form_invalid(self, form):
        print(form.errors)

【讨论】：