added validation to the selling form

[jamestonkin]

1. TITLE:

added validation to the selling form

2. STATUS:

Ready

3. DESCRIPTION:

validation for the selling form. Still able to add negative number on price. Cannot add negative quantities, no more than 2 decimal places on price.

4. RELATED TICKETS:

1

5. FILES CHANGED:

models.py

6. STEPS TO RUN PROJECT:

./damnit_django.sh python manage.py runserver

8. TESTING THE CODE:

No unit tests.

For reference: Bangazon Employee Handbook: Pull Requests

[kayrahbear]

Works for me!

[jamestonkin]