migrate(dossier): fill hidden_by_administration_at and hidden_by_user_at from hidden_at

lib/tasks/deployment/20220309101504_seed_hidden_at_dossiers.rake

@@ -0,0 +1,16 @@
+namespace :after_party do
+  desc 'Deployment task: seed_hidden_at_dossiers'
+  task seed_hidden_at_dossiers: :environment do
+    puts "Running deploy task 'seed_hidden_at_dossiers'"
+
+    Dossier
+      .where.not(hidden_at: nil)
+      .where(hidden_by_user_at: nil, hidden_by_administration_at: nil)
+      .update_all('hidden_by_user_at = hidden_at, hidden_by_administration_at = hidden_at')
+
+    # Update task as completed.  If you remove the line below, the task will
+    # run with every deploy (or every time you call after_party:run).
+    AfterParty::TaskRecord
+      .create version: AfterParty::TaskRecorder.new(__FILE__).timestamp
+  end
+end