由于添加了devise gem,heroku无法在生产中加载我的应用程序,从而给出了应用程序错误:
An error occurred in the application and your page could not be served. Please try again in a few moments.
If you are the application owner, check your logs for details.
来自控制台的特定错误日志是
/app/vendor/bundle/ruby/2.1.0/gems/devise-3.3.0/app/controllers/devise_controller.rb:13:in `<class:DeviseController>': undefined local variable or method `mimes_for_respond_to' for DeviseController:Class (NameError)
from /app/vendor/bundle/ruby/2.1.0/gems/devise-3.3.0/app/controllers/devise_controller.rb:2:in `<top (required)>'
from /app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.0.rc3/lib/active_support/dependencies.rb:274:in `require'
from /app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.0.rc3/lib/active_support/dependencies.rb:274:in `block in require'
from /app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.0.rc3/lib/active_support/dependencies.rb:240:in `load_dependency'
from /app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.0.rc3/lib/active_support/dependencies.rb:274:in `require'
from /app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.0.rc3/lib/active_support/dependencies.rb:360:in `require_or_load'
from /app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.0.rc3/lib/active_support/dependencies.rb:494:in `load_missing_constant'
from /app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.0.rc3/lib/active_support/dependencies.rb:184:in `const_missing'
from /app/vendor/bundle/ruby/2.1.0/gems/devise-3.3.0/app/controllers/devise/confirmations_controller.rb:1:in `<top (required)>'
from /app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.0.rc3/lib/active_support/dependencies.rb:274:in `require'
from …