[Django]-Django: Generate slug field data for existing entries in database

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this is the code I have for the same situation.

models.py:

slug = AutoSlugField(null=True, default=None, unique=True, populate_from='name')

Note the null=True which is compatible with a unique field
In my migrations, I’m adding a data migration by manually editing the migration file

0007_my_migration.py:

def migrate_data_forward(apps, schema_editor):
    for instance in MyModel.objects.all():
        print "Generating slug for %s"%instance
        instance.save() # Will trigger slug update

def migrate_data_backward(apps, schema_editor):
    pass

class Migration(migrations.Migration):
...

    operations = [
        migrations.AddField(
            model_name='my_model',
            name='slug',
            field=autoslug.fields.AutoSlugField(null=True, default=None, editable=False, populate_from='name', unique=True),
            preserve_default=False,
        ),
        migrations.RunPython(
            migrate_data_forward,
            migrate_data_backward,
        ),
    ]
👤raphv

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