pythonのWEBアプリケーション作成途中にエラー（TypeError: 'NoneType' object is not callable）が出た

Question

前提・実現したいこと

djangoを用いてWEBアプリケーションを作っている途中でTypeError: 'NoneType' object is not callableが出てしまった。

エラーメッセージ

http://127.0.0.1:8000/にはアクセスでき、http://127.0.0.1:8000/inquiry/のページに行くとTypeError: 'NoneType' object is not callableが起こってしまう

Django version 3.1.1, using settings 'private_diary.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
2020-09-06 13:57:43,838	[INFO]	C:\Users\rikuw\venv_private_diary\lib\site-packages\django\core\servers\basehttp.py(Line:157)	"GET / HTTP/1.1" 200 4400
2020-09-06 13:57:43,859	[WARNING]	C:\Users\rikuw\venv_private_diary\lib\site-packages\django\core\servers\basehttp.py(Line:157)	"GET /static/css/mystyle.css HTTP/1.1" 404 1671
2020-09-06 13:57:53,117	[ERROR]	C:\Users\rikuw\venv_private_diary\lib\site-packages\django\utils\log.py(Line:224)	Internal Server Error: /inquiry/
Traceback (most recent call last):
  File "C:\Users\rikuw\venv_private_diary\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "C:\Users\rikuw\venv_private_diary\lib\site-packages\django\core\handlers\base.py", line 179, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\rikuw\venv_private_diary\lib\site-packages\django\views\generic\base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "C:\Users\rikuw\venv_private_diary\lib\site-packages\django\views\generic\base.py", line 98, in dispatch
    return handler(request, *args, **kwargs)
  File "C:\Users\rikuw\venv_private_diary\lib\site-packages\django\views\generic\edit.py", line 133, in get
    return self.render_to_response(self.get_context_data())
  File "C:\Users\rikuw\venv_private_diary\lib\site-packages\django\views\generic\edit.py", line 66, in get_context_data
    kwargs['form'] = self.get_form()
  File "C:\Users\rikuw\venv_private_diary\lib\site-packages\django\views\generic\edit.py", line 33, in get_form
    return form_class(**self.get_form_kwargs())
TypeError: 'NoneType' object is not callable
2020-09-06 13:57:53,120	[ERROR]	C:\Users\rikuw\venv_private_diary\lib\site-packages\django\core\servers\basehttp.py(Line:157)	"GET /inquiry/ HTTP/1.1" 500 82013

urls.py

from django.urls import path

from . import views


app_name = 'diary'
urlpatterns = [
    path('', views.IndexView.as_view(), name="index"),
    path('inquiry/', views.InquiryView.as_view(), name="inquiry"),
]

forms.py

from django import forms


class InquiryForm(forms.Form):
    name = forms.CharField(label='お名前', max_length=30)
    email = forms.EmailField(label='メールアドレス')
    title = forms.CharField(label='タイトル', max_length=30)
    message = forms.CharField(label='メッセージ', widget=forms.Textarea)

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        self.fields['name'].widget.attrs['class'] = 'form-control col-9'
        self.fields['name'].widget.attrs['placeholder'] = 'お名前をここに入力してください。'
        self.fields['email'].widget.attrs['class'] = 'form-control col-11'
        self.fields['email'].widget.attrs['placeholder'] = 'メールアドレスをここに入力してください。'
        self.fields['title'].widget.attrs['class'] = 'form-control col-11'
        self.fields['title'].widget.attrs['placeholder'] = 'タイトルをここに入力してください。'
        self.fields['message'].widget.attrs['class'] = 'form-control col-12'
        self.fields['message'].widget.attrs['placeholder'] = 'メッセージをここに入力してください。'

###views.py

from django.shortcuts import render

# Create your views here.
from django.views import generic

from.forms import InquiryForm


class IndexView(generic.TemplateView):
    template_name = "index.html"


class InquiryView(generic.FormView):
    template_name = "inquiry.html"
    from_class = InquiryForm

補足情報（FW/ツールのバージョンなど）

windows
Python 3.8.5

python -m django --version

3.1.1

Answer 1

typoしてます。

# from_class = InquiryForm
form_class = InquiryForm

Comments

[DR.py]

簡単なミスで申し訳ございません。
ありがとうございます。