Rails: activeadmin, undefined method `per' for #

Question

I installed ActiveAdmin successfully:

My gemfile code:

source \'https://rubygems.org\'

 gem \'rails\', \'3.2.10\'

 # Bundle edge Rails instead:
         


        

Answer 1

I'm using Ruby 2.1.5p273 and Rails 4.1.8. I encountered the same problem. @mohamed-ibrahim's answer solved the error underfined method 'per', but got another error

Showing c:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/bundler/gems/activeadmin-06bf79c58216/app/views/active_admin/resource/index.html.arb where line #2 raised: wrong number of arguments (0 for 1)

Adding alias_method :total_count, :count fixed it.

if defined?(WillPaginate)
  module WillPaginate
    module ActiveRecord
      module RelationMethods
        alias_method :per, :per_page
        alias_method :num_pages, :total_pages
        alias_method :total_count, :count
      end
    end
  end
end