add creation of ActiveStorage tables

lib/generators/cw_to_activestorage/cw_to_activestorage_generator.rb

@@ -2,6 +2,10 @@
 class CwToActivestorageGenerator < Rails::Generators::Base
   source_root File.expand_path('templates', __dir__)
 
+  def install_activestorage_tables
+    rake 'active_storage:install'
+  end
+  
   def copy_uploaders
     if (!File.exists?('app/uploaders'))
       directory 'uploaders', 'app/uploaders'

lib/tasks/migration.rake

@@ -1,28 +1,47 @@
 # frozen_string_literal: true
 
 # License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
+
+
+
 namespace :houdini do
   namespace :migration do
+    UPLOADERS_TO_MIGRATE = {
+      'Nonprofit': [
+        :main_image, 
+        :second_image, 
+        :third_image, 
+        :background_image, 
+        :logo
+      ],
+      'Campaign': [
+        :main_image,
+        :background_image, 
+        :banner_image
+      ],
+      'Event': [
+        :main_image,
+        :background_image
+      ],
+      'ImageAttachment': [
+        :file
+      ],
+      'Profile':[
+        :picture
+      ]
+    }
+
     desc "Migrate your CarrierWave uploads to activestorage"
-    task :cw_to_activestorage, [:simulate, :write_out_to_files] => [:environment] do |t, args|
+    task :cw_to_activestorage, [:old_carrierwave_root, :simulate, :write_out_to_files] => [:environment] do |t, args|
       results = []
       Rails.application.eager_load!
       # find activerecord descendents
-      classes_with_uploaders = ActiveRecord::Base.descendants.select do |cls|
-        cls.uploaders&.any?
-      end
-      classes_with_uploaders.each do |cls|
-        cls.find_each do |i|
-            cls.uploaders.keys.each do |uploader_name|
-                    upload_url = i.send("#{uploader_name.to_s}_url")
-                    result = process({upload_url: upload_url, 
-                      uploader_name: uploader_name,
-                      record: i,
-                      })
-                    if (result)
-                      result[:value] = [cls.name].concat(result[:value])
-                      results << result
-                    end
+      UPLOADERS_TO_MIGRATE.each do |k,attributes|
+        klass = Object.get_const(k)
+        klass.where(attributes.map{|i| i.to_s + "IS NOT NULL"}.join(" OR "))
+          .find_each do |record|
+            attributes.each do |attrib|
+              cw_path = record.read_attribute_before_type_cast(attrib.to_s)
             end
           end
       end