Unable to deploy of Heroku because of Python Package with Error - django

Question

I'm trying to upload my django application on Heroku. It works on local because I corrected the error, but for some reason after I added whitenoise to get local files so that I can deploy on Heroku, it keeps bringing up the same error.
I am loading a local package csv-imports and it has an error on line 70.
class ImportModel(models.Model):
""" Optional one to one mapper of import file to Model """
#this is the line with the error and I fixed it here with the on_delete
csvimport = models.ForeignKey(CSVImport, on_delete=models.DO_NOTHING)
numeric_id = models.PositiveIntegerField()
natural_key = models.CharField(max_length=100)
However when I run:
git push heroku master
I get the following error which I have fixed on my local, but seems to keep coming up with Heroku. The file has been changed. I might not be on the right file path given by Heroku there is no app/.heroku/ on my computer. But, there is only one installation of csv-imports on my computer and that one has been fixed as above. Why do I keep getting this error and how do I fix it?
remote: File "/app/.heroku/python/lib/python3.7/site-packages/csvimport/models.py", line 72, in ImportModel
remote: csvimport = models.ForeignKey(CSVImport)
remote: TypeError: __init__() missing 1 required positional argument: 'on_delete'
remote:
remote: ! Error while running '$ python manage.py collectstatic --noinput'.
emote: See traceback above for details.
remote:
remote: You may need to update application code to resolve this error.
remote: Or, you can disable collectstatic for this application:
remote:
remote: $ heroku config:set DISABLE_COLLECTSTATIC=1
remote:
remote: https://devcenter.heroku.com/articles/django-assets
remote: ! Push rejected, failed to compile Python app.
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to gentle-lowlands-98196.
remote:

Answer 1

Problem is with your static directory, first you have to run:
"python manage.py collectstatic"
This will give you the path of your static directory or an exception like you are using STATIC_URL without STATIC_ROOT Directory.