awesome_delete

Recursive delete appropriately

Recursively delete a collection and its all assoication with less sqls. It thinks about the following

• STI (delete the associations of subclass)
• polymorphism
• counter_cache, touch (avoid to unnecessary handle)
• callbacks

Example

class Form < ActiveRecord::Base
  has_many :fields, dependent: :destroy
end

class Field < ActiveRecord::Base
end

Form.delete_collection [1,4,5]

The class method execute_callbacks will execute callbacks. Overwriting it maybe a better choice. eg:

class CloudFile < ActiveRecord::Base
  after_destroy :remove_file

  def self.execute_callbacks ids
    keys = where(id: ids).pluck(:key)
    # do something with all keys
  end

  def remove_file key
    HttpClient.send_request key
  end
end