TIME NOT NULL, FOREIGN KEY (Mesa) REFERENCES Mesas (Mesa) ON DELETE CASCADETINYINT UNSIGNED NOT NULL, FOREIGN KEY (Mesa) REFERENCES Mesas(Mesa) ON DELETE CASC
请考虑以下mySQL表: id INT NOT NULL AUTO_INCREMENT, CONSTRAINT fk_user_preferences FOREIGN KEY (id) REFERENCES user (id) ON DELETE CASCADE解决这个问题很容易:
@OneToOne(fetch = FetchType.LAZY, mappedBy = "user")