I want to push my rails application to heroku when I use git push heroku I got this error also my app in heroku not change at all. I use rails 3.27
cannot load such file -- uglifier
(in /Users/ehsanvalizadeh/Documents/cafemajale/cafemajale/app/assets/javascripts/application.js)
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.7/lib/active_support/dependencies.rb:251:in require'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.7/lib/active_support/dependencies.rb:251:inblock in require'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.7/lib/active_support/dependencies.rb:236:in load_dependency'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.7/lib/active_support/dependencies.rb:251:inrequire'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/compressors.rb:31:in registered_js_compressor'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/bootstrap.rb:18:inblock in run'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/compressors.rb:80:in call'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/compressors.rb:80:incompressor'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/compressors.rb:74:in compress'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/processing.rb:265:inblock in js_compressor='
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/processor.rb:29:in call'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/processor.rb:29:inevaluate'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/tilt-1.3.3/lib/tilt/template.rb:76:in render'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/context.rb:177:inblock in evaluate'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/context.rb:174:in each'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/context.rb:174:inevaluate'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/bundled_asset.rb:26:in initialize'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:244:innew'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:244:in build_asset'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/index.rb:89:inblock in build_asset'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/caching.rb:19:in cache_asset'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/index.rb:88:inbuild_asset'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:163:in find_asset'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/index.rb:56:infind_asset'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/static_compiler.rb:23:in block in compile'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:212:inblock in each_logical_path'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:200:in block (2 levels) in each_file'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:190:ineach'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:190:in each_entry'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:198:inblock in each_file'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:197:in each'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:197:ineach_file'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/sprockets-2.1.3/lib/sprockets/base.rb:210:in each_logical_path'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/static_compiler.rb:18:incompile'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/assets.rake:56:in internal_precompile'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/assets.rake:70:inblock (3 levels) in '
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/assets.rake:60:in block (3 levels) in <top (required)>'
Tasks: TOP => assets:precompile:primary
(See full trace by running task with --trace)
rake aborted!
Command failed with status (1): [/Users/ehsanvalizadeh/.rvm/rubies/ruby-1.9...]
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/assets.rake:12:inruby_rake_task'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/assets.rake:21:in invoke_or_reboot_rake_task'
/Users/ehsanvalizadeh/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.7/lib/sprockets/assets.rake:29:inblock (2 levels) in '
Tasks: TOP => assets:precompile
(See full trace by running task with --trace)
