🎁 delete child works if the parent work is deleted

app/models/concerns/destroyable_children.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+module DestroyableChildren
+  extend ActiveSupport::Concern
+
+  included do
+    before_destroy :destroy_children
+  end
+
+  private
+
+    def destroy_children
+      ordered_works.each(&:destroy)
+    end
+end

app/models/conference_item.rb

@@ -20,6 +20,7 @@ class ConferenceItem < DogBiscuits::ConferenceItem
   before_save :combine_dates
 
   prepend OrderAlready.for(:creator)
+  include DestroyableChildren
   include IiifPrint.model_configuration(
     pdf_split_child_model: self,
     pdf_splitter_service: IiifPrint::SplitPdfs::AdventistPagesToJpgsSplitter,

app/models/dataset.rb

@@ -20,6 +20,7 @@ class Dataset < DogBiscuits::Dataset
   before_save :combine_dates
 
   prepend OrderAlready.for(:creator)
+  include DestroyableChildren
   include IiifPrint.model_configuration(
     pdf_split_child_model: self,
     pdf_splitter_service: IiifPrint::SplitPdfs::AdventistPagesToJpgsSplitter,

app/models/exam_paper.rb

@@ -19,7 +19,7 @@ class ExamPaper < DogBiscuits::ExamPaper
   before_save :combine_dates
 
   prepend OrderAlready.for(:creator)
-
+  include DestroyableChildren
   include IiifPrint.model_configuration(
     pdf_split_child_model: self,
     pdf_splitter_service: IiifPrint::SplitPdfs::AdventistPagesToJpgsSplitter,

app/models/generic_work.rb

@@ -12,6 +12,7 @@ class GenericWork < ActiveFedora::Base
   include SlugMetadata
   include AdventistMetadata
   include SlugBug
+  include DestroyableChildren
   include IiifPrint.model_configuration(
     pdf_split_child_model: self,
     pdf_splitter_service: IiifPrint::SplitPdfs::AdventistPagesToJpgsSplitter,

app/models/image.rb

@@ -11,6 +11,7 @@ class Image < ActiveFedora::Base
   include DogBiscuits::Geo
   include DogBiscuits::PartOf
   include DogBiscuits::PlaceOfPublication
+  include DestroyableChildren
   include IiifPrint.model_configuration(
     pdf_split_child_model: self,
     pdf_splitter_service: IiifPrint::SplitPdfs::AdventistPagesToJpgsSplitter,

app/models/journal_article.rb

@@ -24,6 +24,7 @@ class JournalArticle < DogBiscuits::JournalArticle
   before_save :combine_dates
 
   prepend OrderAlready.for(:creator)
+  include DestroyableChildren
   include IiifPrint.model_configuration(
     pdf_split_child_model: self,
     pdf_splitter_service: IiifPrint::SplitPdfs::AdventistPagesToJpgsSplitter,

app/models/published_work.rb

@@ -25,6 +25,7 @@ class PublishedWork < DogBiscuits::PublishedWork
   before_save :combine_dates
 
   prepend OrderAlready.for(:creator)
+  include DestroyableChildren
   include IiifPrint.model_configuration(
     pdf_split_child_model: self,
     pdf_splitter_service: IiifPrint::SplitPdfs::AdventistPagesToJpgsSplitter,

app/models/thesis.rb

@@ -27,6 +27,7 @@ class Thesis < DogBiscuits::Thesis
   before_save :combine_dates
 
   prepend OrderAlready.for(:creator)
+  include DestroyableChildren
   include IiifPrint.model_configuration(
     pdf_split_child_model: self,
     pdf_splitter_service: IiifPrint::SplitPdfs::AdventistPagesToJpgsSplitter,

spec/models/concerns/destroyable_children_spec.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe DestroyableChildren, type: :model do
+  describe Image do
+    let(:parent) { create(:image) }
+    let(:child1) { create(:image) }
+    let(:child2) { create(:image) }
+
+    before do
+      allow(parent).to receive(:ordered_works).and_return([child1, child2])
+    end
+
+    it 'destroys child works when the parent is destroyed' do
+      expect { parent.destroy }.to change(Image, :count).by(-3)
+    end
+  end
+end