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: # gem 'rails', :git => 'git://github.com/rails/rails.git' gem 'sqlite3' # Gems used only for assets and not required # in production environments by default. group :assets do gem 'sass-rails', '~> 3.2.3' gem 'coffee-rails', '~> 3.2.1' # See https://github.com/sstephenson/execjs#readme for more supported runtimes # gem 'therubyracer', :platforms => :ruby gem 'uglifier', '>= 1.0.3' end gem 'jquery-rails' gem 'twitter-bootstrap-rails' gem 'activeadmin' # gem "meta_search", '>= 1.1.0.pre' gem "spud_photos" gem 'devise' gem 'cancan' gem 'rolify' ``` and i did this: ``` bundle rails g active_admin:install rake db:migrate rails g active_admin:resource product ``` I linked some models to ActiveAdmin. Error after clicking in the dashboard on the product link: ``` undefined method `per' for #<ActiveRecord::Relation:0x4d15ee0> ```

Accepted Answer

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.

Rails: activeadmin, undefined method `per' for #<ActiveRecord::Relation:0x4d15ee0>

Solution

Problem