Djangoで[ django.core.exceptions.ImproperlyConfigured: ]エラーが発生

Question

前提

pythonの経験は2年程度でWEBアプリ開発の経験は全くありません。

実践Djangoという書籍を見ながらDjangoの勉強をしており現在
P44 コードスペニット共有サイトの開発まで進みました。

ファイルは
・tests.py
・apps.py
・admin.py
・forms.py
・models.py
・urls.py
・views.py
・snippet_detail.html
・snippet_new.html
・snippet_edit.html
・top.html
で構成されています。

実現したいこと

django.core.exceptions.ImproperlyConfigured:Creating a ModelForm without either the 'fields' attribute or the 'exclude' attribute is prohibited; form SnippetForm needs updating.
というエラーが発生しテストが実行できません。

ご知見のある方、ご教示いただければ幸いです。

発生している問題・エラーメッセージ

Found 1 test(s).
Traceback (most recent call last):
  File "/Users/hasegawayoshio/djangosnippets/manage.py", line 22, in <module>
    main()
  File "/Users/hasegawayoshio/djangosnippets/manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/__init__.py", line 425, in execute_from_command_line
    utility.execute()
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/__init__.py", line 419, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/commands/test.py", line 24, in run_from_argv
    super().run_from_argv(argv)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/base.py", line 373, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/base.py", line 417, in execute
    output = self.handle(*args, **options)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/commands/test.py", line 59, in handle
    failures = test_runner.run_tests(test_labels)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/test/runner.py", line 933, in run_tests
    self.run_checks(databases)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/test/runner.py", line 852, in run_checks
    call_command('check', verbosity=self.verbosity, databases=databases)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/__init__.py", line 187, in call_command
    return command.execute(*args, **defaults)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/base.py", line 417, in execute
    output = self.handle(*args, **options)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/commands/check.py", line 63, in handle
    self.check(
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/management/base.py", line 438, in check
    all_issues = checks.run_checks(
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/checks/registry.py", line 77, in run_checks
    new_errors = check(app_configs=app_configs, databases=databases)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/checks/urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/core/checks/urls.py", line 23, in check_resolver
    return check_method()
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/urls/resolvers.py", line 446, in check
    for pattern in self.url_patterns:
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/utils/functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/urls/resolvers.py", line 632, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/utils/functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/urls/resolvers.py", line 625, in urlconf_module
    return import_module(self.urlconf_name)
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/Users/hasegawayoshio/djangosnippets/djangosnippets/urls.py", line 19, in <module>
    from snippets.views import top
  File "/Users/hasegawayoshio/djangosnippets/snippets/views.py", line 6, in <module>
    from snippets.forms import SnippetForm
  File "/Users/hasegawayoshio/djangosnippets/snippets/forms.py", line 4, in <module>
    class SnippetForm(forms.ModelForm):
  File "/opt/homebrew/Caskroom/miniforge/base/lib/python3.9/site-packages/django/forms/models.py", line 248, in __new__
    raise ImproperlyConfigured(
django.core.exceptions.ImproperlyConfigured: Creating a ModelForm without either the 'fields' attribute or the 'exclude' attribute is prohibited; form SnippetForm needs updating.

該当のソースコード

from django.db import models
from django.conf import settings

# Create your models here.
class Snippet(models.Model):
    title = models.CharField('タイトル', max_length = 128)
    code = models.TextField('コード', blank = True)
    description = models.TextField('説明', blank = True)
    created_by = models.ForeignKey(settings.AUTH_USER_MODEL,
                                   verbose_name = "投稿者",
                                   on_delete = models.CASCADE)
    created_at = models.DateTimeField("投稿日", auto_now_add = True)
    updated_at = models.DateTimeField("更新日", auto_now = True)
    
    def __str__(self):
        return self.title

試したこと

'ググったところ　fields' と 'exclude'の両方は指定できないという風に
認識しましたが、それがコードのどこのことを言っているのかわからなかったため
修正できませんでした。

Answer 1

エラーの内容から、SnippetFormにfieldsまたはexcludeのどちらも定義されていないように思いますので、forms.pyを確認してみてください。

Comments

[shishi_maru440]

お忙しい中ご回答いただきありがとうございます。
forms.pyを確認いたしました。

---------------------------------------------------------------
from django import forms
from snippets.models import Snippet

class SnippetForm(forms.ModelForm):
class Meta:
model = Snippet
feilds = ('title', 'code', 'description')
-----------------------------------------------------------

fields であるべき部分がfeildsになってしまっていました。
こちらを修正し無事解決しました。

ありがとうございました。