Add Modal Config Section

app/helpers/rails_admin/form_builder.rb

@@ -10,7 +10,16 @@ def generate(options = {})
         :model_config => @template.instance_variable_get(:@model_config),
         :nested_in => false
       })
-      groups = options[:model_config].send(options[:nested_in] ? :nested : options[:action]).with(:form => self, :object => @object, :view => @template).visible_groups
+
+      if options[:nested_in]
+        action = :nested
+      elsif @template.request.format == 'text/javascript'
+        action = :modal      
+      else
+        action = options[:action]
+      end
+
+      groups = options[:model_config].send(action).with(:form => self, :object => @object, :view => @template).visible_groups
 
       object_infos +
       groups.map do |fieldset|

lib/rails_admin/config/sections.rb

@@ -4,6 +4,7 @@
 require 'rails_admin/config/sections/update'
 require 'rails_admin/config/sections/create'
 require 'rails_admin/config/sections/nested'
+require 'rails_admin/config/sections/modal'
 require 'rails_admin/config/sections/list'
 require 'rails_admin/config/sections/export'
 require 'rails_admin/config/sections/show'

lib/rails_admin/config/sections/modal.rb

@@ -0,0 +1,10 @@
+require 'rails_admin/config/sections/edit'
+
+module RailsAdmin
+  module Config
+    module Sections
+      class Modal < RailsAdmin::Config::Sections::Edit
+      end
+    end
+  end
+end