Question

I have a strange issues when i want to persist entity which holds reference to itself.

DB:

Table PROJECT has Column PARENT_ID which holds references to itself.

Model:

/**
 * @OneToOne(targetEntity="Model_Name")
 * @JoinColumn(name="PARENT_ID", referencedColumnName="ID")
 **/

protected $_parentId;

Code:

$project->setParentId(int);

After setting PARENT_ID i persist entity, and all data except PARENT_ID are stored inside DB.

EDIT

Id field/column

/**
 * @Id
 * @Column(type="integer", name="ID")
 * @GeneratedValue(strategy="IDENTITY")
 */
protected $_id;

/**
 * @return int
 */
public function getParentId()
{
    return $this->_parentId;
}

/**
 * @param  int $parentProjectId
 * @return Application_Model_Data_Project $this
 */
public function setParentId($parentId)
{
    $this->_parentId = $parentId;

    return $this;
}

Answer 1

Can you post more code? That part looks just fine.

Here’s a SSCCE of a working self-referencing entity. Maybe that’ll help.

/**
 * @Entity @Table(name="messages")
 **/
class Model_Message
{
    /** 
     * @Id @Column(name="message_id",type="integer") @GeneratedValue 
     **/
    protected $id;

    /**
     *@ManyToOne(targetEntity="Model_Message")
     *@JoinColumn(name="parent_id", referencedColumnName="message_id")
     **/
    protected $parentMessage;

    /**
     * @OneToMany(targetEntity="Model_Message", mappedBy="parentMessage")
     **/
    protected $replies = array();

    [...]
}

EDIT

If you want to save a relationship to another object with doctrine, you must save the object, not the id. Which means you have to set the Model_Name object, and not the id (integer) in your variable tagged as a Model_Name (targetEntity). (Doctrine will use the int automatically in the DB).

See my example above with the ManyToOne.

/**
 * @OneToOne(targetEntity="Model_Name")
 * @JoinColumn(name="PARENT_ID", referencedColumnName="ID")
 **/
protected $_parent;


[...]

/**
 * @param  Model_Name $parentProject
 * @return Application_Model_Data_Project $this
 */
public function setParent($parent)
{
    $this->_parent = $parent;

    return $this;
}