addSql('ALTER TABLE activity ADD accompanyingPeriod_id INT DEFAULT NULL'); $this->addSql('ALTER TABLE activity ADD CONSTRAINT FK_AC74095AD7FA8EF0 FOREIGN KEY (accompanyingPeriod_id) REFERENCES chill_person_accompanying_period (id) NOT DEFERRABLE INITIALLY IMMEDIATE'); } public function down(Schema $schema): void { $this->addSql('ALTER TABLE activity DROP CONSTRAINT FK_AC74095AD7FA8EF0'); $this->addSql('ALTER TABLE activity DROP accompanyingPeriod_id'); } }