upowia
Last Updated: February 25, 2016
·
521
· ktkaushik

Remove method for Mongoid::Paranoia

module Mongoid
  module Paranoia
    extend ActiveSupport::Concern

    module ClassMethods
    end

    module InstanceMethods

    # 'remove' method is soft-delete for Paranoia module which i read somewhere is extracted from
    # 'acts_as_paranoia' gem. In any which way, i was still unable to use the callback before_destroy, hence this hack.
    def remove
      super
      has_deleted_the_record = false
      if self.remove_associated_records
        return has_deleted_the_record = true
      end
      has_deleted_the_record
    end

    # What would this do ?
    # Basically, this would fetch all the associated models with embeds_many and references_many, we do not want parent model. 
    # We only want the child model to delete( or in this case 'remove') the records.
    # basic algo :
    # 1. Get the first element i.e. model_info from the array of the associated models.
    # 2. Check if its nil
    # 3. If not, downcase and pluralize and call that method.
    #    for ex: Client.first.projects
    # 4. remove them
    # NOTE: remove is now recursive
      def remove_associated_records
        associated_model =   self.class.reflect_on_all_associations(:embeds_many).first || self.class.reflect_on_all_associations(:references_many).first
        deleted = false
        if !associated_model.nil?
          self.send( associated_model.class_name.downcase.pluralize ).each do |record|
            record.remove
            deleted = true
          end 
        else
          return deleted = true     
        end
        return deleted
      end
    end
  end
end