假设您正在使用 ModelForm ，请使用实例关键字参数，并传递您正在更新的模型。

所以，如果你有 MyModel 和 MyModelForm （后者必须扩展 django.forms.ModelForm ），那么您的代码段可能如下所示：

  my_record = MyModel.objects.get（id = XXX）
 form = MyModelForm（instance = my_record）
 pre> 

然后，用户通过POST发回数据：
  form = MyModelForm（request.POST，instance = my_record）
 
顺便提一下， ModelForm 的文档在这里： http://docs.djangoproject.com/en/1.8/topics/forms/modelforms/ a> 
 
i'm new to django so i'm sorry for my newbie question 


i have a model and i need to let user edit data inside it using django forms or any other way.


look at the image above , i want to show this form ready populated with the data and let user update  it.

what is the best way to do this ?


EDIT : here is my views.py code 
def exam_Edit(request,examName,number=0):
    numner = int(number)
    number = int(number)
    questionNo = int(numner)
    Myexam = models.Exam.objects.get(name = examName)



    QuestionsAll = models.Question.objects.filter(exam = Myexam)

    myQeustion = Question.objects.filter(exam = Myexam)[nextQuestion]

    answer1 =  models.Asnwers.objects.filter(question=myQeustion)[0]
    answer2 =  models.Asnwers.objects.filter(question=myQeustion)[1]
    answer3 =  models.Asnwers.objects.filter(question=myQeustion)[2]
    answer4 = models.Asnwers.objects.filter(question=myQeustion)[3]


    # HERE IS MY PROBLEM : the line below creates a form with a data but it doesn't save it to the save object     
    form = QuestionsEditForm(initial = {'questionText':myQeustion.__unicode__() , 'firstChoiceText':answer1.__unicode__(),'secondChoiceText':answer2.__unicode__(),'thirdChoiceText':answer3.__unicode__(),'forthChoiceText':answer4.__unicode__()})

    if request.method =='POST':
        #if post 

        if form.is_valid():
            questionText = form.cleaned_data['questionText']
            Myexam = Exam.objects.get(name = examName)
            myQeustion.questionText = form.cleaned_data['questionText']



            answer1.answerText = form.cleaned_data['firstChoiceText']
            answer1.save()

            answer2.answerText = form.cleaned_data['secondChoiceText']
            answer2.save()

            answer3.answerText = form.cleaned_data['thirdChoiceText']
            answer3.save()

            answer4.answerText = form.cleaned_data['forthChoiceText']
            answer4.save()

 variables = RequestContext(request,     {'form':form,'examName':examName,'questionNo':str(nextQuestion)})
 return render_to_response('exam_edit.html',variables)               
please help 
Assuming you are using a ModelForm, use the instance keyword argument, and pass the model you are updating.

So, if you have MyModel and MyModelForm (the latter of which must extend django.forms.ModelForm), then your code snippet might look like:
my_record = MyModel.objects.get(id=XXX)
form = MyModelForm(instance=my_record)
And then, when the user sends back data by POST:
form = MyModelForm(request.POST, instance=my_record)
Incidentally, the documentation for ModelForm is here: http://docs.djangoproject.com/en/1.8/topics/forms/modelforms/