In this post, we are going to share a quick tips about how to restrict deleting action and showing customised flash notice in ActiveAdmin. We use this data model to demonstrate how we do it.
A book has many orders, and we want to restrict deleting action of the book and showing error message in Active Admin if book is accociated to the orders. We have two ways to restrict the delete action, which are using
dependent: :restrict_with_error and
dependent: :restrict_with_error in your model file.
In ActiveAdmin you can use
restrict_with_error to restrict deleting action from admin.
class Book < ApplicationRecord has_many :orders, dependent: :restrict_with_error end
But it would not showing the message why we can’t delete the data.
What if we want to show the error message in flash notice, we can use
restrict_with_exception to raise an exception and overriding the destroy action in ActiveAdmin to show the message. Here is how we do.
class Book < ApplicationRecord has_many :orders, dependent: :restrict_with_exception end
ActiveAdmin.register Book do permit_params :title, :author controller do def destroy begin resource.destroy redirect_to admin_books_path, notice: "Book successfully deleted!" rescue ActiveRecord::DeleteRestrictionError => e redirect_to resource_path(resource), notice: e.message # can use e.message to get error from Rails or customise your message end end end end
Then it will show the error message at flash notice
Here is our Ruby on Rails quite tips, see you next time!