在符号实体中变量的设置器

Question

我该如何为儿童做固定器，以保存关系的孩子：

/**
 * @ORMManyToMany(targetEntity="User", mappedBy="parents", cascade={"persist"})
 */
private $children;
/**
 * @ORMManyToMany(targetEntity="User", inversedBy="children")
 * @ORMJoinTable(
 *     name="family",
 *     joinColumns={@ORMJoinColumn(name="user_id", referencedColumnName="id")},
 *     inverseJoinColumns={@ORMJoinColumn(name="family_user_id", referencedColumnName="id")}
 * )
 */
private $parents;
/**
 * User constructor.
 */
public function __construct() 
{
    $this->children = new DoctrineCommonCollectionsArrayCollection();
    $this->parents = new DoctrineCommonCollectionsArrayCollection();
}

我的设定器，它不会丢弃错误，也不会保存关系：

/**
 * @param mixed $children
 */
public function setChildren($children)
{
    $this->children[] = $children;
    $children->setParents($this);
}

用户学说保存，关系而不是。

Answer 1

//Methods to add parents and Children
public function addChild(User $child)
{
    $this->children->add($child);
    $child->addParent($this);
    return $this;
}
public function addParent(User $parent)
{
    $this->parents->add($parent);
    return $this;
}

//Methods to remove parents and children
public function removeChild(User $child)
{
    $this->children->removeElement($child);
    $child->removeParent($this);
    return $this;
}
public function removeParent(User $parent)
{
    $this->parents->removeElement($parent);
    return $this;
}