Django中的Formset返回的“可变形式不存在”

Question

我是Django的新手。我使用下面的链接在第一个用例中首次在Django中实现了表单集，但我陷入了这个错误。

即使我使用的是formset，HTML也会查找名为“ form”的变量。我不确定是什么问题。

https://medium.com/@taranjeet/adding-forms-dynamically-to-a-django-formset-375f1090c2b0

urls.py:

from django.urls import path
from django.urls import re_path


from . import views

from .views import (
    create_projectform_normal,
)

urlpatterns=[
    path('', views.index, name='index'),
    path('dashboard', views.dashboard, name='dashboard'),
    path('madhan', create_projectform_normal, name='create_projectform_normal'),

HTML：

<form class="form-horizontal" method="POST" action="">
    {% csrf_token %}
    {{ formset.management_form }}
    0999999999
    {% for form in formset %}
    <div class="row form-row spacer">
        <div class="col-2">
            <label>{{form.project_title.label}}</label>
        </div>
        <div class="col-4">
            <div class="input-group">
                {{form.project_title}}
                <div class="input-group-append">
                    <button class="btn btn-success add-form-row">+</button>
                </div>
            </div>
        </div>
    </div>
    {% endfor %}
    <div class="row spacer">
        <div class="col-4 offset-2">
            <button type="submit" class="btn btn-block btn-primary">Create</button>
        </div>
    </div>
    </form>

SaveForms.py：

Views.py:

from django.shortcuts import render, redirect

from projects.forms import ProjectForm2Formset
from projects.models import ProjectModel

def create_projectform_normal(request):
    template_name = 'pages/form.html'

    heading_message = 'Formset Demo'
    if request.method == 'GET':
        formset = ProjectForm2Formset(request.GET or None)
    elif request.method == 'POST':
        formset = ProjectForm2Formset(request.POST)
        if formset.is_valid():
            for form in formset:
                # extract name from each form and save
                project_title = form.cleaned_data.get('project_title')
                # save book instance
                if project_title:
                    ProjectForm2(project_title=project_title).save()
            # once all books are saved, redirect to book list view
            return redirect('form')
    return render(request, template_name, {
        'formset': formset,
        'heading': heading_message,
    })

Models.py

class ProjectModel(models.Model):

    project_title = models.CharField(max_length=255)
    class Meta:
        db_table = 'Project'
    def __str__(self):
        return self.project_title

Forms.py:

class ProjectForm2(forms.Form):
    project_title = forms.CharField(
        label='Project Title',
        widget=forms.TextInput(attrs={
            'class': 'form-control',
            'placeholder': 'Enter the project Title'
        })
    )

ProjectForm2Formset = formset_factory(ProjectForm2, extra=1)