javascript - while upgrading rails 3.0.11 into rails 3.1.11 -

javascript - while upgrading rails 3.0.11 into rails 3.1.11 -

while upgrading rails version got below error: actioncontroller::routingerror (undefined method `javascript_expansions' actionview::helpers::assettaghelper:module):

and how enable asset pipe line during upgrading

thanks in advance

this railscast should help you.

javascript ruby-on-rails