Add rake task to remove trashed elements

We removed the element trashed with Alchemy 6.0

This task helps to clean up the database with a Rake task.

    bin/rake alchemy:tidy:remove_trashed_elements

lib/alchemy/tasks/tidy.rb

@@ -62,6 +62,23 @@ def remove_orphaned_elements
         end
       end
 
+      def remove_trashed_elements
+        puts "\n## Removing trashed elements"
+        elements = Alchemy::Element.unscoped.where(position: nil)
+        if elements.any?
+          log "Destroying #{elements.size} trashed elements"
+          nested_elements, parent_elements = elements.partition(&:parent_element_id)
+          (nested_elements + parent_elements).each do |element|
+            element.destroy
+            print "."
+          end
+          puts "\n"
+          log "Done", :message
+        else
+          log "No trashed elements found", :skip
+        end
+      end
+
       def remove_orphaned_contents
         puts "\n## Removing orphaned contents"
         contents = Alchemy::Content.unscoped.all

lib/tasks/alchemy/tidy.rake

@@ -8,6 +8,7 @@ namespace :alchemy do
       Rake::Task["alchemy:tidy:element_positions"].invoke
       Rake::Task["alchemy:tidy:content_positions"].invoke
       Rake::Task["alchemy:tidy:remove_orphaned_records"].invoke
+      Rake::Task["alchemy:tidy:remove_trashed_elements"].invoke
     end
 
     desc "Fixes element positions."
@@ -36,6 +37,11 @@ namespace :alchemy do
       Alchemy::Tidy.remove_orphaned_contents
     end
 
+    desc "Remove trashed elements."
+    task remove_trashed_elements: [:environment] do
+      Alchemy::Tidy.remove_trashed_elements
+    end
+
     desc "List Alchemy elements usage"
     task elements_usage: :environment do
       puts "\n"