无法从视图 Django 中设置表单选项

Question

我从 Django Form ChoiceField set choices in View in Form initial

那里学到了如何做到这一点

然而它似乎不能正常工作，没有给出选择

查看：

form_class = AskMCQuestionForm()
mc_choices = []
if question.One:
    mc_choices.append(tuple((1, question.One)))
if question.Two:
    mc_choices.append(tuple((2, question.Two)))
if question.Three:
    mc_choices.append(tuple((3, question.Three)))
if question.Four:
    mc_choices.append(tuple((4, question.Four)))
if question.Five:
    mc_choices.append(tuple((5, question.Five)))
mc_choices = tuple(mc_choices)
print(mc_choices)
form_class.fields['user_answer'].choices = mc_choices
form_class.fields['assignment'].initial = assignment
form_class.fields['exam'].initial = question.exam
form_class.fields['correct_answer'].initial = question.correct_answer
form_class.fields['text'].initial = question.text
print("About to render page for MC question")
return render(request, 'Exam/ask_question.html', {'question': question, 'form': form_class})

形式：

class AskMCQuestionForm(forms.ModelForm):
    class Meta:
        model = MC_Question
        fields = ('text', 'user_answer', 'assignment', 'correct_answer', 'exam',)
        widgets = {
            'text': forms.TextInput(attrs={'class': 'form-control', 'readonly': True}),
            'user_answer': forms.Select(attrs={'class': 'form-control'}),
            'assignment': forms.Select(attrs={'class': 'form-control'}),
            'correct_answer': forms.HiddenInput(),
            'exam': forms.HiddenInput(),

        }

型号：

class MC_Question(models.Model):
    One = models.CharField(max_length=200)
    Two = models.CharField(max_length=200)
    Three = models.CharField(max_length=200, blank=True, null=True)
    Four = models.CharField(max_length=200, blank=True, null=True)
    Five = models.CharField(max_length=200, blank=True, null=True)

    class Answers(models.IntegerChoices):
        one = 1
        two = 2
        three = 3
        four = 4
        five = 5
    text = models.CharField(max_length=200)
    correct_answer = models.IntegerField(choices=Answers.choices, blank=True, null=True)
    user_answer = models.CharField(max_length=200)
    exam = models.ForeignKey(Test, on_delete=models.CASCADE)
    assignment = models.ForeignKey(Assignment, on_delete=models.CASCADE, blank=True, null=True)

question 是 MC_Question 的对象，与表单正在创建的对象相同。抱歉，如果我遗漏了一个重要的细节，我已经好几年没有在 Whosebug

上发帖了

Answer 1

默认情况下，模型表单创建一个 TextInput 来与 user_answer 字段一起工作（是一个没有选择的 models.CharField），而 TextInput 字段不知道如何处理 choices 参数。您可以尝试将选择直接分配给小部件：

form_class.fields['user_answer'].widget.choices = mc_choices

或将自定义字段添加到您的模型表单中：

class AskMCQuestionForm(forms.ModelForm):
    user_answer = forms.ChoiceField(...)

无法从视图 Django 中设置表单选项

Unable to set form choices from view Django

django

django-forms

django-views