UPGRADE FROM 3.x to 4.0 ======================= * The bundle now requires MongoDB ODM 2.0. You should have a look at its UPGRADE document and update your application accordingly. * The `default_repository_class` configuration option was dropped. Use the `default_document_repository_class` option instead. * The `retry_connect` and `retry_query` configuration options were dropped without replacement. * The YAML metadata driver was dropped without replacement. * The `doctrine:mongodb:generate:documents` and `doctrine:mongodb:generate:repositories` commands have been dropped without replacement. * The `doctrine.odm.mongodb.document_manager` service was removed. Use the `doctrine_mongodb.odm.document_manager` service instead.