 | Get the depth of a comment, given (maybe) its parent's CommentId.
fetchCommentDepthFromMaybeParentIdDB :: Maybe CommentId -> DB Int
fetchCommentDepthFromMaybeParentIdDB =
    maybe (return 0) (fmap (+1) . fetchCommentDepthDB)


fetchCommentDepthFromMaybeParentIdDB :: Maybe CommentId -> DB Int
fetchCommentDepthFromMaybeParentIdDB =
    maybe (return 0) (fmap (+1) . fetchCommentDepthDB)
fetchCommentDepthFromMaybeParentIdDB =
    maybe (return 0) (fmap (+1) . fetchCommentDepthDB)