Edit file File name : doctrine.yaml Content :parameters: # Adds a fallback in case the env is not set. env(DATABASE_URL): '' doctrine: dbal: url: '%env(DATABASE_URL)%' driver: pdo_mysql charset: UTF8 auto_commit: false schema_filter: '/^(users|migration_versions|)$/' default_table_options: charset: utf8 collate: utf8_unicode_ci logging: "%kernel.debug%" profiling: "%kernel.debug%" orm: auto_generate_proxy_classes: false naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware auto_mapping: true mappings: App: is_bundle: false type: annotation dir: '%kernel.project_dir%/core' prefix: 'App' alias: App Save