django.db.utils.IntegrityError:

Question

django.db.utils.IntegrityError: The row in table \'main_tutorial\' with primary key \'1\' has an invalid foreign key: main_tutorial.tutorial_series_id contains a

Answer 1

I faced the same problem just I am also working with the same. All you got to do is to

just delete "migrations" folder from the "main()" and also the db.sqlite file too.

The error is probably occurring because we have Tutorial already in db which is not linked to TutorialSeries so.., to make it linked to the db, make the changes above and then again perform commands.

What I got was:

python manage.py makemigrations

Output:

No changes detected

Next one

python manage.py migrate

Output:

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 sessions.0001_initial... OK

Make sure while performing these commands you have linked Tutorial with TutorialSeries. And guys making things done this way makes you earlier data lost from the database. Be careful about that.

Have a Nice day & happy coding.