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

You can simply delete all the objects in the main_tutorial table from django shell:

1. goto command prompt
2. python manage.py shell
3. from main.models import Tutorial
4. Tutorial.objects.all().delete()

(main being the app name here)

This will delete all the objects in the Tutorial table and then makemigrations and migrate and it should work just fine.

Answer 2

Try to delete all the migration files exept __init__.py and also delete db.sqlite3. After that run makemigrations and migrate again

Answer 3

Delete migration files from the folder except

__init__.py

Then:

python manage.py makemigrations
python manage.py migrate

Answer 4

Try using on_delete = models.CASCADE without a default parameter.