Django：从另一个模型对象动态生成 ChoiceField 值

Question

我想用动态生成的 ChoiceField 选项实现一个 Django 表单。

在我的 views.py 中，我定义了以下（相关）方法：

from .forms import OptionForm

def get_choice():
  return # like this [(q.optionA, q.optionA), (q.optionB, q.optionB), (q.optionC, q.optionC), (q.optionD, q.optionD)]

# how can I pass q to this __init__ method
class OptionForm(forms.Form):
  options= forms.ChoiceField(choices= [])
  def __init__(self, *args, **kwargs):
    super(OptionForm, self).__init__(*args, **kwargs)    
    self.fields['options'].choices = get_choice()


def viewtest(request, test_pk):

# get the test object containing all the questions
# each question contains four options using which I want to generate ChoiceField options corresponding to each question
# each option is available as q.optionA, q.optionB q.optionC & q.optionD
  test= get_object_or_404(Test, pk= test_pk)
  options= []
  for q in test.questions.all():    
    opform= OptionForm() # how do I pass q.optionA, q.optionB q.optionC & q.optionD here to dynamically provide ChoiceField options?
    options.append(opform)
  return render(request, 'tests/test.html', {'test': test, 'options': options})

Answer 1

要从模型中获得选择， ModelChoiceField是更好的选择。 在此处查找更多详细信息： https : //docs.djangoproject.com/en/3.1/ref/forms/fields/#django.forms.ModelChoiceField