Make activeadmin-mongoid play nice with ActiveRecord resources

lib/active_admin/mongoid/resource.rb

@@ -3,34 +3,52 @@
 
 ActiveAdmin::Resource # autoload
 class ActiveAdmin::Resource
-  def resource_table_name
-    resource_class.collection_name
+  original_resource_table_name = instance_method(:resource_table_name)
+
+  define_method(:resource_table_name) do
+    if(resource_class.included_modules.include? Mongoid::Document)
+      return resource_class.collection_name
+    else
+      return original_resource_table_name.bind(self).()
+    end
   end
 end
 
 ActiveAdmin::ResourceController # autoload
 class ActiveAdmin::ResourceController
-  before_filter :skip_sidebar!
+#  before_filter :skip_sidebar!
 
   protected
 
-  def skip_sidebar!
-    @skip_sidebar = true
-  end
+  # def skip_sidebar!
+  #   @skip_sidebar = true
+  # end
+
+  original_sort_order = instance_method(:sort_order)
 
   # Use #desc and #asc for sorting.
-  def sort_order(chain)
-    params[:order] ||= active_admin_config.sort_order
-    table_name = active_admin_config.resource_table_name
-    if params[:order] && params[:order] =~ /^([\w\_\.]+)_(desc|asc)$/
-      chain.send($2, $1)
+  define_method(:sort_order) do |chain|
+    if(chain.included_modules.include? Mongoid::Document)
+      params[:order] ||= active_admin_config.sort_order
+      table_name = active_admin_config.resource_table_name
+      if params[:order] && params[:order] =~ /^([\w\_\.]+)_(desc|asc)$/
+        chain.send($2, $1)
+      else
+        chain # just return the chain
+      end
     else
-      chain # just return the chain
-    end
+      original_sort_order.bind(self).(chain)
+    end      
   end
 
+  original_search = instance_method(:search)
+
   # Disable filters
-  def search(chain)
-    chain
+  define_method(:search) do |chain|
+    if(chain.included_modules.include? Mongoid::Document)
+      chain
+    else
+      original_search.bind(self).(chain)
+    end
   end
 end