最初在django内联表单集中设置不同的外键值

Question

我正在尝试使用django创建结果管理系统。为了存储主题标记，我使用了django内联表单集。问题是用户必须从django中的Select Field下拉菜单中手动选择一个主题，我认为这不是一个好选择。因此，我决定将SelectField最初设置为这些外部字段。但是初始值始终设置为Subject模型的最后一个对象。

def subject_mark_create(request, grade_pk, exam_pk):
    subjects =  Subject.objects.get_by_grade(grade_pk).order_by('name')
    SubjectMarkFormset = inlineformset_factory(Exam, SubjectMark,  extra=subjects.count(), max_num=subjects.count(), fk_name='exam', form=SubjectMarkForm, can_delete=False)
    exam = get_object_or_404(Exam, pk=exam_pk)
    if request.method == "GET":
        formset = SubjectMarkFormset(instance=exam)
        for form in formset:
            for subject in subjects:
                form['subject'].initial = subject

My Current inlineformset

What I desired my formset should look like

Answer 1

下面的代码将帮助您将表单的主题字段的初始值保留为主题对象

def subject_mark_create(request, grade_pk, exam_pk):
    subjects =  Subject.objects.get_by_grade(grade_pk).order_by('name')
    SubjectMarkFormset = inlineformset_factory(Exam, SubjectMark,  extra=subjects.count(), max_num=subjects.count(), fk_name='exam', form=SubjectMarkForm, can_delete=False)
    exam = get_object_or_404(Exam, pk=exam_pk)
    if request.method == "GET":
        formset = SubjectMarkFormset(instance=exam)
        for index, form in enumerate(formset):
            form['subject'].initial = subjects[index]