Django - 使用内联保存和更新formset

Question

我有一个TestingQuestion和TestingQuestionOption类。 在创建TestingQuestions时，我也使用stackinline来创建TestingQuestionOption。 目前创建新的TestingQuestion以及TestingQuestionOptions工作。 我遇到的问题是当我想保存我已经创建的TestingQuestion时。即尝试编辑并保存更改。 我在这一行上得到“list index out of range”错误

 "question = saved_options[0].question"

位于“TestingQuestionFormSet”类

下的“save_existing_objects”方法中

saved_options = super(TestingQuestionFormSet, self).save_new_objects(commit) 

返回None，我不知道为什么，因为我期望它返回TestingQuestionOption。 任何帮助都将大大鼓励。感谢

这是代码

models.py

class TestingQuestion(models.Model):

class TestingQuestionOption(models.Model):
    question = models.ForeignKey(TestingQuestion, null=True, blank=False)

admin.py

class TestingQuestionOptionInline(admin.StackedInline, SummernoteInlineModelAdmin):
    model = TestingQuestionOption
    formset = TestingQuestionFormSet

class TestingQuestionAdmin(SummernoteModelAdmin, ImportExportModelAdmin):
    form = TestingQuestionCreateForm
    inlines = (TestingQuestionOptionInline,)

forms.py

class TestingQuestionFormSet(forms.models.BaseInlineFormSet):

    def save_new_objects(self, commit=True):
        saved_options = super(TestingQuestionFormSet, self).save_new_objects(commit)
        if commit:
            question = saved_options[0].question
            for option in saved_options:
                if option.order == 0:
                    option.order = TestingQuestionOption.objects.filter(question=question).count() + 1
                if option.name == "Auto Generated":
                    option.name = "%s Option %s" % (question, option.order)
                option.save()

            if len(saved_options) < 2:
                order = TestingQuestionOption.objects.filter(question=question).count() + 1
                name = "%s Option %s" % (question, order)
                TestingQuestionOption.objects.create(name=name, order=order, question=question, correct=False)
        return saved_options

    def save_existing_objects(self, commit=True):
        saved_options = super(TestingQuestionFormSet, self).save_existing_objects(commit)
        if commit:
            question = saved_options[0].question
            for option in saved_options:
                if option.order == 0:
                    option.order = TestingQuestionOption.objects.filter(question=question).count() + 1
                if option.name == "Auto Generated":
                    option.name = "%s Option %s" % (question, option.order)
                option.save()

            if len(saved_options) < 2:
                order = TestingQuestionOption.objects.filter(question=question).count() + 1
                name = "%s Option %s" % (question, order)
                TestingQuestionOption.objects.create(name=name, order=order, question=question, correct=False)
        return saved_options

class TestingQuestionCreateForm(forms.ModelForm):
    def save(self, commit=True):
        testing_question = super(TestingQuestionCreateForm, self).save(commit=False)
        if testing_question.order == 0 or testing_question.name == "Auto Generated":
            count = TestingQuestion.objects.filter(module__id=self.data.get("module")).count() + 1
            module = Module.objects.get(id=self.data.get("module"))
            name = "%s Question %d" % (module, count)
            while TestingQuestion.objects.filter(name=name):
                count += 1
                name = "%s Question %d" % (module, count)
            testing_question.name = name
            testing_question.order = count
        testing_question.save()

        question_content = self.cleaned_data.get("question_content")
        testing_question.question_content = process_mathml_content(question_content, 0, testing_question.id)

        answer_content = self.cleaned_data.get("answer_content")
        testing_question.answer_content = process_mathml_content(answer_content, 1, testing_question.id)

        testing_question.save()

        return testing_question

    class Meta:
        model = TestingQuestion