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

Active Admin need kaminari pagination If you want to use will paginate, you can make alias for will paginate functions to match kaminari one:

# config/initializers/will_paginate.rb
if defined?(WillPaginate)
  module WillPaginate
    module ActiveRecord
      module RelationMethods
        alias_method :per, :per_page
        alias_method :num_pages, :total_pages
      end
    end
  end
end

module ActiveRecord
  class Relation
    alias_method :total_count, :count
  end
end

And this one worked for me.

Answer 2

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

Answer 3

This worked for me:

initializers/will_paginate.rb

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

Answer 4

I had the same issue and switched from WillPaginate to Kaminari for my app.

It is a simple change: paginate(page:1,per_page:10) becomes page(1).per(10)

I guess it depends how deeply willPaginate is enmeshed with your app.

Answer 5

The above answers do not work anymore. An updated answer was given here by @zitoon:

if defined?(WillPaginate)
  module WillPaginate
    module ActiveRecord
      module RelationMethods
        def per(value = nil) per_page(value) end
        def total_count() count end
      end
    end
    module CollectionMethods
      alias_method :num_pages, :total_pages
    end
  end
end

I tried it myself. Works.

Answer 6

This one helped me:

 if defined?(WillPaginate)
   ActiveSupport.on_load :active_record do
     module WillPaginate
       module ActiveRecord
         module RelationMethods
           def per(value = nil) per_page(value) end
           def total_count() count end
         end
       end
       module CollectionMethods
         alias_method :num_pages, :total_pages
       end
     end
   end
 end