···
$ python3 manage.py makemigrations
No changes detected
 /code/django/blogproject~/code/django/blogproject /code/django/blogproject python3 manage.py makemigrations comments
Migrations for ‘comments':
comments/migrations/0001_initial.py
- Create model Comment
 /code/django/blogproject~/code/django/blogproject /code/django/blogproject python3 manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, blog, comments, contenttypes, sessions, users
Running migrations:
No migrations to apply.
···

$ python3 manage.py makemigrations comments
No changes detected in app 'comments'
$~/code/django/blogproject$ python3 manage.py migrate comments
Operations to perform:
 Apply all migrations: comments
Running migrations:
 Applying comments.0001_initial... OK