マイグレーションができない

Question

前提

Djangoで日記アプリを作成しています。
マイグレーションを試みたところエラーになりました。

実現したいこと

マイグレーションの実施

エラーメッセージ

form_class = DiaryForm
NameError: name 'DiaryForm' is not defined

該当のソースコード

from django.views.generic import TemplateView
from django.views.generic import CreateView
from django.urls import reverse_lazy
from .forms import DiaryForm

class IndexView(TemplateView):
    template_name = 'index.html'

class DiaryCreateView(CreateView):
    template_name = 'diary_create.html'
    form_class = 'DiaryForm'
    success_url = reverse_lazy('diary:diary_create_complete')

class DiaryCreateCompleteView(TemplateView):
    template_name = 'diary_create_complete.html'

from django import forms
from .models import Diary

class DiaryForm(forms.ModelForm):
    class Meta:
        model = Diary
        fields = ('date', 'title', 'text',)

from django.db import models
from django.utils import timezone
import uuid

class Diary(models.Model):

        class Meta:
             abstract = True 
             app_label = 'diary'

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    date = models.DateField(verbose_name='日付', default=timezone.now)
    title = models.CharField(verbose_name='タイトル', max_length=40)
    text = models.CharField(verbose_name='本文', max_length=200)
    created_at = models.DateTimeField(verbose_name='作成日時', default=timezone.now)
    updated_at = models.DateTimeField(verbose_name='編集日時', blank=True, null=True)

"""
Django settings for config project.

Generated by 'django-admin startproject' using Django 4.0.6.

For more information on this file, see
https://docs.djangoproject.com/en/4.0/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/4.0/ref/settings/
"""

import os
from pathlib import Path

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'django-insecure-#0ud%e$1#w9*4g=a#x3nwe=0y+afe^@_1*u=%b!8szxaq%#7ig'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'config.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates'),],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'config.wsgi.application'


# Database
# https://docs.djangoproject.com/en/4.0/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }
}


# Password validation
# https://docs.djangoproject.com/en/4.0/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/4.0/topics/i18n/

LANGUAGE_CODE = 'ja-jp'

TIME_ZONE = 'Asia/Tokyo'

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/4.0/howto/static-files/

STATIC_URL = 'static/'

# Default primary key field type
# https://docs.djangoproject.com/en/4.0/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

試したこと1

form_class = DiaryForm
success_url = reverse_lazy('diary:diary_create_complete')

を削除してみたところ

No changes detected

と出ました。

試したこと2

下記のようにシングルクォーテーションをつけたところ

class DiaryCreateView(CreateView):
    template_name = 'diary_create.html'
    form_class = 'DiaryForm'
    success_url = 'reverse_lazy'('diary:diary_create_complete')

エラーメッセージが変わりました。

    success_url = 'reverse_lazy'('diary:diary_create_complete')
TypeError: 'str' object is not callable

試したこと3

models.pyに下記コードを追加しました。

class Meta:
        abstract = True 
        app_label = 'diary'

エラーメッセージが下記に変わりました。

No changes detected

Comments

[tatamyiwathy]

DailyFormのコードを見せていただけませんか？

[tsuba96999]

ご返信いただきありがとうございます。
DiaryFormのコードとは下記のことでしょうか。

'''
from django import forms
from .models import Diary

class DiaryForm(forms.ModelForm):
class Meta:
model = Diary
fields = ('date', 'title', 'text',)
'''

[tatamyiwathy]

エラーメッセージは

form_class = DiaryForm
NameError: name 'DiaryForm' is not defined

だけでしたか？前後にも出力があるならそちらも提示していただけないでしょうか

[tsuba96999]

ご返信いただきありがとうございます。
下記が全エラーメッセージです。

'''
Traceback (most recent call last):
File "manage.py", line 22, in <module>
main()
File "manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/__init__.py", line 446, in execute_from_command_line
utility.execute()
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/__init__.py", line 440, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/base.py", line 414, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/base.py", line 455, in execute
self.check()
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/base.py", line 487, in check
all_issues = checks.run_checks(
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/checks/registry.py", line 88, in run_checks
new_errors = check(app_configs=app_configs, databases=databases)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/checks/urls.py", line 14, in check_url_config
return check_resolver(resolver)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/checks/urls.py", line 24, in check_resolver
return check_method()
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/urls/resolvers.py", line 480, in check
for pattern in self.url_patterns:
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/utils/functional.py", line 49, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/urls/resolvers.py", line 696, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/utils/functional.py", line 49, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/urls/resolvers.py", line 689, in urlconf_module
return import_module(self.urlconf_name)
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/Users/user/djangotutorial/mydiaryproject/config/urls.py", line 6, in <module>
path('', include('diary.urls')),
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/urls/conf.py", line 38, in include
urlconf_module = import_module(urlconf_module)
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/Users/user/djangotutorial/mydiaryproject/diary/urls.py", line 2, in <module>
from . import views
File "/Users/user/djangotutorial/mydiaryproject/diary/views.py", line 7, in <module>
class DiaryCreateView(CreateView):
File "/Users/user/djangotutorial/mydiaryproject/diary/views.py", line 9, in DiaryCreateView
form_class = DiaryForm
NameError: name 'DiaryForm' is not defined
'''

[tatamyiwathy]

度々質問ですみません

DaiaryFormはviews.pyの中にあるのではなく、別のソースにあるのですよね？
そうだとしたらviews.pyにDaiaryFormがあるソースをimportしていますでしょうか？

[tsuba96999]

ご質問いただきありがとうございます。
DiaryFormはforms.pyに入っています。
views.pyの1行目に
'''
from . import forms
'''
と追記してみましたが、下記エラーが発生しました。

'''
RuntimeError: Model class diary.models.Diary doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.
'''

正直なところ、importの書き方すらよくわかっておりませんのでご教示いただければ幸いです。

[tatamyiwathy]

views.py、forms.py、models.pyをそれぞれ見せていただけますでしょうか
できれば質問を編集して「該当のソースコード」に掲載していただけると見やすいです。

[tsuba96999]

承知しました。
該当のソースコードに掲載いたしましたので、ご確認頂けると幸いです。

Answer 1

下記2点の変更で解決しました。
・settings.pyのINSTALLED_APPS にdiaryを追記
・models.pyに下記を追記

    class Meta:
    app_label = 'diary'

Answer 2

views.pyにこちらがないためエラーが発生しているように見られます。

from .forms import DiaryForm

Comments

[tsuba96999]

ご回答ありがとうございます。
ご回答の通り変更したところ、下記エラーが発生しました。

'''
Traceback (most recent call last):
File "manage.py", line 22, in <module>
main()
File "manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/__init__.py", line 446, in execute_from_command_line
utility.execute()
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/__init__.py", line 440, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/base.py", line 414, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/base.py", line 455, in execute
self.check()
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/management/base.py", line 487, in check
all_issues = checks.run_checks(
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/checks/registry.py", line 88, in run_checks
new_errors = check(app_configs=app_configs, databases=databases)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/checks/urls.py", line 14, in check_url_config
return check_resolver(resolver)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/core/checks/urls.py", line 24, in check_resolver
return check_method()
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/urls/resolvers.py", line 480, in check
for pattern in self.url_patterns:
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/utils/functional.py", line 49, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/urls/resolvers.py", line 696, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/utils/functional.py", line 49, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/urls/resolvers.py", line 689, in urlconf_module
return import_module(self.urlconf_name)
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/Users/user/djangotutorial/mydiaryproject/config/urls.py", line 6, in <module>
path('', include('diary.urls')),
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/urls/conf.py", line 38, in include
urlconf_module = import_module(urlconf_module)
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/Users/user/djangotutorial/mydiaryproject/diary/urls.py", line 2, in <module>
from . import views
File "/Users/user/djangotutorial/mydiaryproject/diary/views.py", line 4, in <module>
from .forms import DiaryForm
File "/Users/user/djangotutorial/mydiaryproject/diary/forms.py", line 2, in <module>
from .models import Diary
File "/Users/user/djangotutorial/mydiaryproject/diary/models.py", line 5, in <module>
class Diary(models.Model):
File "/Users/user/djangotutorial/.djangoenv/lib/python3.8/site-packages/django/db/models/base.py", line 132, in __new__
raise RuntimeError(
RuntimeError: Model class diary.models.Diary doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.
'''

※該当のソースコードを最新のコードに変更済みです。

[tsuba96999]

ご返信いただきありがとうございます。
settings.pyと試したこと３を追記いたしました。
最新のエラーは「No changes detected」です。

[tatamyiwathy]

settings.pyのINSTALLED_APPS にdiaryがないのが原因ではないでしょうか