client side validation of comments
article name and profile delegation
comment delegation
method delegation tests
add respond_to tests
file content type validation
size validator to file size validator
content type validation
custom 404 error page
custom error pages with error layout
forbidden error for unauthorized access
remove record not found rescue
add ancestry index
cache ancestry depth
add polymorphic constraints
add file_validators gem
update file validators gem
change :in to :allow in content type validation