CommentModerator's moderate_after does not accept 0.

[andrepleblanc@…]

the CommentModerator has two fields which together allow you to make comments default to non-public X-days after the related object is posted. however, it doesn't allow for that X to be zero.

from django/contrib/comments/moderation.py:223
if self.auto_moderate_field and self.moderate_after:
should probably read:
if self.auto_moderate_field and self.moderate_after is not None:

this would allow for comments to always be moderated. (perhaps I'm missing the "correct" way to have all comments non-public by default. but none the less, the principle of least surprise says that this should work with a zero.

[James Bennett]

The correct solution is to write a subclass of CommentModerator which overrides the moderate() method to always return True (see ​the documentation for details). Supporting a zero-length period in which comments can be posted unmoderated really isn't something that should work here.