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##
# The Comment model is used for creating and managing comments.
#
# @since 26-09-2011
#
class Comment < Sequel::Model
plugin :timestamps, :create => :created_at, :update => :updated_at
# A comment can belong to only one post and one user
many_to_one :post
many_to_one :user
##
# Validates a comment before saving it to the database.
#
# @since 26-09-2011
#
def validate
validates_presence(:comment)
# Comments can either have user ID or a custom name. The user ID is only set
# when the user is logged in.
unless self.user_id
validates_presence(:username)
end
end
##
# Gets the name of the author from either an associated user or the "name"
# field.
#
# @since 26-09-2011
# @return [String]
#
def username
if user and user.username
return user.username
else
return super
end
end
end # Comment
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