formset的简单使用

1.modelform

class StudentStudyRecordModelForm(forms.ModelForm):

    class Meta:
        model = StudentStudyRecord
        fields = ["score","homework_note"]

    def __init__(self,*args,**kwargs):
        super().__init__(*args,**kwargs)
        for field in self.fields.values():
            field.widget.attrs.update({"class":"form-control"})

2.view

from django.forms.models import modelformset_factory
class EditStudentStudyRecordView(View):

    def get(self,request,edit_id):
        model_formset_cls = modelformset_factory(model=StudentStudyRecord,form=StudentStudyRecordModelForm,extra=0)
        queryset = StudentStudyRecord.objects.filter(classstudyrecord_id=edit_id)
        formset = model_formset_cls(queryset=queryset)

        class_study_record = ClassStudyRecord.objects.filter(pk=edit_id).first()
        title = class_study_record

        return render(request,"edit_studentstudyrecord.html",{"formset":formset,"title":title})

    def post(self,request,edit_id):
        model_formset_cls = modelformset_factory(model=StudentStudyRecord, form=StudentStudyRecordModelForm, extra=0)

        formset = model_formset_cls(request.POST)
        if formset.is_valid():
            formset.save()

        return redirect(request.path)

3.html

 <form method="post" action="">
                     {% csrf_token %}
                     {{ formset.management_form }}#必须有，否则发送post请求时会报错

                     <table class="table table-bordered">
                         <thead>
                         <tr>
                             <th>姓名</th>
                             <th>考勤</th>
                             <th>作业成绩</th>
                             <th>作业评语</th>
                         </tr>
                         </thead>
                         <tbody>
                         {% for form in formset %}
                             <tr>
                                 {{ form.id }}
                                 <td>{{ form.instance.student }}</td>
                                 <td>{{ form.instance.get_record_display }} </td>
                                 <td>{{ form.score }} </td>
                                 <td>{{ form.homework_note }}</td>
                             </tr>
                         {% endfor %}
                         </tbody>
                     </table>
                     <input type="submit" value="保存">
                 </form>