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>