Comment モデルを作成する前に，マイグレーションを実行しておきます．まだマイグレーションを実行していない状態であることを確認しておきます．
(py39) C:\Users\lecture\Documents\django\django_comment>python manage.py showmigrations ⏎
admin
[ ] 0001_initial
[ ] 0002_logentry_remove_auto_add
[ ] 0003_logentry_add_action_flag_choices
auth
[ ] 0001_initial
[ ] 0002_alter_permission_name_max_length
[ ] 0003_alter_user_email_max_length
[ ] 0004_alter_user_username_opts
[ ] 0005_alter_user_last_login_null
[ ] 0006_require_contenttypes_0002
[ ] 0007_alter_validators_add_error_messages
[ ] 0008_alter_user_username_max_length
[ ] 0009_alter_user_last_name_max_length
[ ] 0010_alter_group_name_max_length
[ ] 0011_update_proxy_permissions
[ ] 0012_alter_user_first_name_max_length
comments
(no migrations)
contenttypes
[ ] 0001_initial
[ ] 0002_remove_content_type_name
sessions
[ ] 0001_initial
(py39) C:\Users\lecture\Documents\django\django_comment>
マイグレーションを実行します．Django 共通で必要となるテーブルがいくつか作成されました．
(py39) C:\Users\lecture\Documents\django\django_comment>python manage.py migrate ⏎
Operations to perform:
Apply all migrations: admin, auth, contenttypes, sessions
Running migrations:
Applying contenttypes.0001_initial... OK
Applying auth.0001_initial... OK
Applying admin.0001_initial... OK
Applying admin.0002_logentry_remove_auto_add... OK
Applying admin.0003_logentry_add_action_flag_choices... OK
Applying contenttypes.0002_remove_content_type_name... OK
Applying auth.0002_alter_permission_name_max_length... OK
Applying auth.0003_alter_user_email_max_length... OK
Applying auth.0004_alter_user_username_opts... OK
Applying auth.0005_alter_user_last_login_null... OK
Applying auth.0006_require_contenttypes_0002... OK
Applying auth.0007_alter_validators_add_error_messages... OK
Applying auth.0008_alter_user_username_max_length... OK
Applying auth.0009_alter_user_last_name_max_length... OK
Applying auth.0010_alter_group_name_max_length... OK
Applying auth.0011_update_proxy_permissions... OK
Applying auth.0012_alter_user_first_name_max_length... OK
Applying sessions.0001_initial... OK
(py39) C:(\Users\lecture\Documents\django\django_comment>
再びマイグレーションの実行状況を確認します．
(py39) C:\Users\lecture\Documents\django\django_comment>python manage.py showmigrations ⏎
admin
[X] 0001_initial
[X] 0002_logentry_remove_auto_add
[X] 0003_logentry_add_action_flag_choices
auth
[X] 0001_initial
[X] 0002_alter_permission_name_max_length
[X] 0003_alter_user_email_max_length
[X] 0004_alter_user_username_opts
[X] 0005_alter_user_last_login_null
[X] 0006_require_contenttypes_0002
[X] 0007_alter_validators_add_error_messages
[X] 0008_alter_user_username_max_length
[X] 0009_alter_user_last_name_max_length
[X] 0010_alter_group_name_max_length
[X] 0011_update_proxy_permissions
[X] 0012_alter_user_first_name_max_length
comments
(no migrations)
contenttypes
[X] 0001_initial
[X] 0002_remove_content_type_name
sessions
[X] 0001_initial
(py39) C:\Users\lecture\Documents\django\django_comment>
SQLite を操作してデータベースに作成されたテーブルの一覧を確認しておきます．このとき，SQLite の操作用に新たな Anaconda prompt を起動し，SQLite への接続状態を維持しておくと良いでしょう．（Git や migration 等の操作用，runserver 用，sqlite3 用に 3 つの Anaconda prompt を起動しておくと便利かもしれません．）
(py39) C:\Users\lecture\Documents\django\django_comment>sqlite3 db.sqlite3 ⏎ SQLite version 3.38.2 2022-03-26 13:51:10 Enter ".help" for usage hints. sqlite> .tables ⏎ auth_group auth_user_user_permissions auth_group_permissions django_admin_log auth_permission django_content_type auth_user django_migrations auth_user_groups django_session sqlite>