I defined new row location inside Django model Shop as follows:
class Shop(models.Model):
location = models.ForeignKey(Location, on_delete=models.CASCADE)
When trying to migration via
python3 manage.py makemigrations
, I receive this output response in command-line:
It is impossible to add a non-nullable field 'location' to shop without specifying a default. This is because the database needs something to populate existing rows.
Please select a fix:
1) Provide a one-off default now (will be set on all existing rows with a null value for this column)
2) Quit and manually define a default value in models.py.
Select an option:
How can I fix this without making the field nullable?
I want an empty entry being defined and the model links there.
You should set the default value at the field definition as follows:
location = models.ForeignKey(Location, on_delete=models.CASCADE, default=Location.objects.first().pk)