Undefined method “reorder” for # using ActiveAdmin

Question

I have a problem with ActiveAdmin using Ruby ruby 1.9.2p290 and Ruby on Rails 3.2.1.

I used this wiki page to setup the resource for the AdminUsers that works perfec

Answer 1

The active admin make special processing of @resource variables. Where resource is correponding class name passed to register method. So for code:

ActiveAdmin.register Project do  
end

name of variable is

`@project`

We must not assign value to variable with such name. Also such varibles may be object of ActiveRecord::Relation class. And how @Oliver write the name like @projects_all is good choice. The using of skip_before_filter is solve the problem too.

One crafty thing need to check. The controller of resource may not have any filters. The controller of resource may not exists at all. What is the filter name to put to skip_before_filter? And where is such filters? The default application controller is used anyway. The filter may be installed at main application controller. The error message of this problem is not informative at all. So need to check application controller for installed filters too.

Answer 2

Ah, I've found the solution. I don't know exactly why the error happened but I had to change my application_controller.

In the application_controller I fetched all projects to @projects:

before_filter :getActiveProjects

protected

  def getActiveProjects
    @projects = Project.isactive.find(:all, :order => 'LOWER(name) asc')
  end

That was confusing ActiveAdmin. After I changed that to

before_filter :getActiveProjects

protected

  def getActiveProjects
    @projects_all = Project.isactive.find(:all, :order => 'LOWER(name) asc')
  end

and projects_controller index action to

def index
  @projects = @projects_all
end

everything worked fine ;)

Answer 3

An easier solution is to just skip the filter in the particular active admin controller:

ActiveAdmin.register Project do  
    controller do
      skip_before_filter :getActiveProjects
    end
end