问题
I am trying to use PDFKit using rails 3, I followed the railscast tutorial and found that I get the following error:
: undefined method `wrap_parameters' for ActionController::Base:Class (NoMethodError)
http://railscasts.com/episodes/220-pdfkit
回答1:
Maybe you're accidentally loading Rails 3.0.x on a Rails 3.1 application?
It won't work if you generate a Rails 3.1 application, which adds config/initializers/wrap_parameters.rb, and then try to boot it with Rails 3.0.x.
If you want Rails 3.1:
Are you running with bundler, e.g. bundle exec unicorn_rails or bundle exec rake?
If you want Rails 3.0.x:
Regenerate the application by running rails new appname to see what needs to change.
来源：https://stackoverflow.com/questions/6677352/error-while-using-pdf-kit