Ruby On Rails Heroku APP -

Ruby On Rails Heroku APP -

i working on ruby on rails shopify app deployed on heroku. error occured "uninitialized class variable @@storage in shopifysessionrepository". unable trace this.i rollback code deployed code , app worked. now, code have errors. cannot force more code heroku. , cant access code working(previous code). dont how out of situation now. new git, heroku , ruby on rails.is there way, can access working code using git or else. if not, error message "uninitialized class variable @@storage in shopifysessionrepository" , why occurred?

i using rails 4.0.2

this issue occurred because the version of shopify gem automatically upgraded while pushing code heroku. because no version specified in gem file gem, upgraded. file shopifysessionrepository not nowadays in before version of gem file. added in latest version. added older version of gem in gem file gem 'shopify_app','~> 4.4.4'

and worked. don't know code not compatible latest version of gem or there bug in latest version. degrading version solved issue.

ruby-on-rails ruby ruby-on-rails-3 git heroku