Rake task to merge organizations

lib/tasks/merge_organizations.rake

@@ -0,0 +1,30 @@
+# require "active_record"
+
+desc "merges one organization into another"
+task :merge_organizations, [:disappearing_organization_id, :surviving_organization_id] => :environment do |_, args|
+  disappearing_organization = Organization.find_by(id: args.disappearing_organization_id)
+  surviving_organization = Organization.find_by(id: args.surviving_organization_id)
+
+  abort if disappearing_organization.nil? || surviving_organization.nil?
+
+  puts "This will merge #{disappearing_organization.name} into #{surviving_organization.name}"
+  puts "Are you sure you want to do this? (y/n)"
+  answer = STDIN.gets.chomp
+  abort unless answer.downcase == "y"
+
+  relevant_models = [
+    Course,
+    CourseGroup,
+    EventGroup,
+    EventSeries,
+    Lottery,
+    ResultsCategory,
+    ResultsTemplate,
+    Stewardship,
+  ]
+
+  relevant_models.each do |model|
+    puts "Merging #{model.table_name.titleize.pluralize}"
+    model.where(organization: disappearing_organization).update_all(organization_id: surviving_organization.id)
+  end
+end