Create a report for files with no size

Ref #4990

app/reports/files_with_no_size.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+# Invoke via:
+# bin/rails r -e production "FilesWithNoSize.report"
+class FilesWithNoSize
+  JSON_PATH = '$.contains[*].structural.contains[*]'
+  SQL = <<~SQL.squish.freeze
+    SELECT ro.external_identifier
+           FROM repository_objects AS ro, repository_object_versions AS rov WHERE
+           ro.head_version_id = rov.id
+           AND ro.object_type = 'dro'
+           AND jsonb_array_length(jsonb_path_query_array(rov.structural, '#{JSON_PATH}')) !=
+            jsonb_array_length(jsonb_path_query_array(rov.structural, '#{JSON_PATH}.size'))
+  SQL
+
+  def self.report
+    puts "item_druid\n"
+    result = ActiveRecord::Base.connection.execute(SQL)
+
+    result.each do |row|
+      puts row
+    end
+  end
+end