How to create an ical duration field in Django?

Question

I use a Django model that I register with the admin site. One of the fields of my model represents a duration. I would like to use the DateTimeField, but instead of saving the value to a datetime in the database, I would like to save it as varchar, formatted according to RFC5545 (ical) (e.g., a duration of 1 day 1 hour 1 min 1 sec would be stored as "P1DT1H1M1S"). How would I do this? Should I overwrite the DateTimeField?

Answer 1

You could create a custom Django field for it instead of overwriting DateTimeField.

https://docs.djangoproject.com/en/dev/howto/custom-model-fields/