Added custom formset class that requires at least one row to be supplied.
Make certain form fields allow nulls.
Tweak
Add hack to replace blank fields with nulls.
Make sources required
Make sources required
Make sources required
Remove label from posts form.
Fix type and display post on listing
Commented out create-person button
Get rid of context_data method
Copy post.id over to post.label
Check form validity before saving new person