Python-сообщество

 class Test(models.Model):
    name=models.CharField('Имя теста',max_length=300)
    author=models.ForeignKey(User,on_delete=models.CASCADE,verbose_name='Автор')
def questionimg_directory_path(instance, filename):
    return 'Question/foto/test_{0}/{1}'.format(instance.test.id, filename)
class Question(models.Model):
    test=models.ForeignKey(Test,on_delete=models.CASCADE,verbose_name='тест',null=True,blank=True)
    question=models.TextField(verbose_name="Текст вопроса")
    answer=models.TextField(verbose_name="Ответ на вопрос")
    img=models.FileField('Фото',upload_to=questionimg_directory_path,null=True,blank=True)

 from django.contrib import admin
from django.urls import path
from core import views
app_name='core'
urlpatterns = [
    path('test/<int:id>/edit_question/<int:id1>/edit_par_question', views.edit_par_question, name='edit_par_question'),
    path('test/<int:id>', views.test, name='test'),
]

 def edit_question(request,id,id1):
    test=Test.objects.get(id=id)
    que=Question.objects.get(id=id1)
    context={
    'test':test,
    'que':que,
    }
    template='test.html'
    return render(request,template,context)
def edit_par_question(request,id,id1):
    te=Test.objects.get(id=id)
    que=Question.objects.get(id=id1)
    if request.method=='POST':
        if te.author==request.user:
            que.question=request.POST.get("question")
            que.answer=request.POST.get("answer")
            que.img=request.POST.get("img")
            print(request.POST.get("img"))# выводит None
            que.save()
    return HttpResponseRedirect(reverse('core:test',args=(te.id,)))

 <form method="post" action="{%url 'core:edit_par_question' test.id que.id%}" enctype="multipart/form-data">
       {% csrf_token %}
       <label>Текст вопроса:</label>
       <input type="text" name="question" value="{{que.question}}" class="form-control"/>
      <label>Ответ на вопрос:</label>
    <input type="text" name="answer" value="{{que.answer}}" class="form-control"/>
    <label>Фото:</label>
    {%if que.img%}На данный момент {{que.img.url}}<br>{%endif%}
    <input type="file" name="img" value="{{que.img}}" class="form-control"/>
    <button type="submit" class="btn btn-primary">Изменить</button>
       </form>