[andreibondarev]

Closes #11, closes #12, closes #42, closes #45.

Changes

• Routes only generated for controllers in /admin path #11 Custom namespaces: new AdministrateBatchActions.namespace setting (symbol or array, default :admin). Controllers under each namespace get routes using the scheme from Ensure batch routes are generated under the :admin scope #47/Ensure route collisions don't occur with admin/controller/batch_action and admin/controller/:id (#show) #49, e.g. Backoffice::WidgetsController#archive_batch_action → backoffice_archive_batch_action_widgets at POST /backoffice/administrate_batch_actions/widgets/archive_batch_action.
• Change adding query parameters #45 Query params: the button URL is now built with URL/searchParams, so query params already on the button are kept. It also starts from the original href on every click, so cancelling the confirm and clicking again doesn't append the ids twice.
• Ruby 2.7.5, Rails 6.1.4.4, Administrate 0.16.0 undefined batch_action_name #12 Docs: the README example used a batch_action_name placeholder that looked like a method call. It now passes a string label.
• Batch action not in admin on 0.3.4 #42: already fixed by Ensure batch routes are generated under the :admin scope #47/Ensure route collisions don't occur with admin/controller/batch_action and admin/controller/:id (#show) #49. This PR updates the README route examples (which still showed the old delete_batch_action_admin_users name) and adds the changelog entry.

Notes

• The route scheme from Ensure batch routes are generated under the :admin scope #47/Ensure route collisions don't occur with admin/controller/batch_action and admin/controller/:id (#show) #49 renames every route (e.g. admin_delete_batch_action_users_path), so the next release should probably be 0.5.0 rather than a patch.
• Controllers outside the configured namespaces are skipped now instead of being routed under /admin.

Testing

• bundle exec rspec: 9 examples, 0 failures (adds a custom-namespace route spec)
• JS click handler checked in Node against a stubbed DOM: existing query params are kept and repeated clicks don't duplicate ids. Not tested in a real browser.