Symfony2 Doctrine2级联定义但不起作用

Question

我有一个实体，其关系包含设置（多个）。要添加或删除实体，我必须使用级联，但它不起作用，我在代码中找不到错误。

实体：

/**
 * @var DepartmentSettings
 *
 * @ORM\OneToMany(targetEntity="DepartmentSettings", mappedBy="department", cascade={"persist", "refresh", "remove"}, orphanRemoval=true)
 */
protected $departmentsettings;

我得到的错误：

An exception occurred while executing 'DELETE FROM department WHERE id = ?' with params [13]:

SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (`hotflo20`.`department_settings`, CONSTRAINT `FK_DCFBBAEFAE80F5DF` FOREIGN KEY (`department_id`) REFERENCES `department` (`id`))

希望有人可以解决这个问题。我现在真的被困住了

Answer 1

只有

cascade设置出现，然后通过EntityManager与您的entites一起操作。然后你做一个DELETE查询它非常小心。您需要在onDelete="CASCADE"实体中设置DepartmentSettings，以便在数据库中生成触发器。

/**
 * @ORM\ManyToOne(targetEntity="Department", inversedBy="departmentsettings")
 * @ORM\JoinColumn(name="department_id", referencedColumnName="id", onDelete="CASCADE")
 */
protected $department;