customize rails_admin delete action for a specific model - ruby-on-rails-3

Question

I've been reading the rails_admin wiki section about customizing actions but I am totally new to rails_admin and this documentation is a bit confusing for me.
What I need to achieve is that, when an admin user clicks the options to delete a specific Employee (Employee is a model in my app), the code to actually delete the given employee cannot be the default way in which rails_admin deletes, but a given block of code that I need to provide to rails_admin somehow.
Note that I still want the rest of the data models accessible through rails_admin to be deleted in the usual fashion. Only the employee model needs to have the custom delete routine.

Answer 1

I just encountered the same problem because I need users to be marked for deletion and not deleted right away.
After hacking around a bit I've finally found a way : overriding RailsAdmin's default delete action.
Here's the delete action after I added my own custom code (not deleting but marking for deletion with a custom notice, hiding the delete button if the user is already marked for deletion). :
# config/initializers/rails_admin_delete_override.rb
module RailsAdmin
module Config
module Actions
class Delete < RailsAdmin::Config::Actions::Base
RailsAdmin::Config::Actions.register(self)
register_instance_option :member do
true
end
register_instance_option :route_fragment do
'delete'
end
register_instance_option :http_methods do
[:get, :delete]
end
register_instance_option :authorization_key do
:destroy
end
register_instance_option :visible? do
bindings[:object].class.base_class.name != 'User' || !bindings[:object].to_destroy?
end
register_instance_option :controller do
Proc.new do
if request.get? # DELETE
respond_to do |format|
format.html { render #action.template_name }
format.js { render #action.template_name, :layout => false }
end
elsif request.delete? # DESTROY
redirect_path = nil
#auditing_adapter && #auditing_adapter.delete_object(#object, #abstract_model, _current_user)
if #object.class.base_class.name == 'User'
#object.to_destroy!
flash[:success] = t("admin.flash.user_destroy_successful", :name => #model_config.label)
redirect_path = index_path
else
if #object.destroy
flash[:success] = t("admin.flash.successful", :name => #model_config.label, :action => t("admin.actions.delete.done"))
redirect_path = index_path
else
flash[:error] = t("admin.flash.error", :name => #model_config.label, :action => t("admin.actions.delete.done"))
redirect_path = back_or_index
end
end
redirect_to redirect_path
end
end
end
register_instance_option :link_icon do
'icon-remove'
end
end
end
end
end
You can find the original action code here : https://github.com/sferik/rails_admin/blob/master/lib/rails_admin/config/actions/delete.rb

Answer 2

After hours of hacking, I have found a simpler way of customizing an action.
All you need is to create a different module name (In my case is 'MyRailsAdmin'), then extends the original action class, eg. 'Delete'
# config/initializers/rails_admin_delete.rb
require 'rails_admin/config/actions'
require 'rails_admin/config/actions/base'
module MyRailsAdmin
module Config
module Actions
class Delete < RailsAdmin::Config::Actions::Delete
RailsAdmin::Config::Actions::register(self)
register_instance_option :controller do
proc do
if request.get? # DELETE
respond_to do |format|
format.html { render #action.template_name }
format.js { render #action.template_name, layout: false }
end
elsif request.delete? # DESTROY
redirect_path = nil
#auditing_adapter && #auditing_adapter.delete_object(#object, #abstract_model, _current_user)
# [CUSTOM DELETE] mark as deleted (status = 0) rather than actually hard delete it
#object.status = 0
if #object.save
flash[:success] = t('admin.flash.successful', name: #model_config.label, action: t('admin.actions.delete.done'))
redirect_path = index_path
else
flash[:error] = t('admin.flash.error', name: #model_config.label, action: t('admin.actions.delete.done'))
redirect_path = back_or_index
end
redirect_to redirect_path
end
end
end
end
end
end
end