addSql('ALTER TABLE device ADD current_image_id INT DEFAULT NULL'); $this->addSql('ALTER TABLE device ADD CONSTRAINT fk_device_current_image FOREIGN KEY (current_image_id) REFERENCES image (id) ON DELETE SET NULL NOT DEFERRABLE INITIALLY IMMEDIATE'); $this->addSql('CREATE INDEX idx_device_current_image ON device (current_image_id)'); } public function down(Schema $schema): void { $this->addSql('ALTER TABLE device DROP CONSTRAINT fk_device_current_image'); $this->addSql('DROP INDEX idx_device_current_image'); $this->addSql('ALTER TABLE device DROP COLUMN current_image_id'); } }