Zend_Db_Table_Abstract::_primary 返回数组? [英] Zend_Db_Table_Abstract::_primary returns array?
问题描述
所以我定义了一个这样的模型:
So I have defined a model like this:
class Model extends Zend_Db_Table_Abstract
{
$_primary = 'modelID';
/**
*
* @param mixed $primaryKey
* @return int
*/
public function delete($primaryKey)
{
$where = $this->getAdapter()->quoteInto($this->_primary.' = ?', $primaryKey);
return parent::delete($where);
}
}
在调用 delete 方法时,我收到一条警告,告诉我 $this->_primary 是一个数组.为什么?我已经为 $_primary 属性分配了一个字符串值.
When calling the delete method, I get a warning telling me $this->_primary is an array. Why? I have assigned a string value to $_primary property.
来自日志:
2012-02-05T17:41:03+00:00 INFO (6): Array
(
[1] => modelID
)
推荐答案
Zend_Db_Table 将主键存储为数组,以防使用复合键,所以严格来说,最好(非强制)像这样声明它们:-
Zend_Db_Table stores primary keys as an array in case a compound key is used, so strictly speaking, it is best (not compulsory) to declare them like this:-
class Model extends Zend_Db_Table_Abstract
{
public function __construct(array $config = null)
{
$this->_primary[1] = 'modelId';
parent::__construct($config);
//.............
来自 Zend_Db_Table_Abstract 中的文档块:-
From the docblock in Zend_Db_Table_Abstract:-
/**
* The primary key column or columns.
* A compound key should be declared as an array.
* You may declare a single-column primary key
* as a string.
*
* @var mixed
*/
protected $_primary = null;
从dockblock 获取$_identity:-
And from the dockblock for $_identity:-
/**
* If your primary key is a compound key, and one of the columns uses
* an auto-increment or sequence-generated value, set _identity
* to the ordinal index in the $_primary array for that column.
* Note this index is the position of the column in the primary key,
* not the position of the column in the table. The primary key
* array is 1-based.
*
* @var integer
*/
protected $_identity = 1;
所以你可以用它来代替.
如果您的主键中只有一列,那么它将位于 $_primary[1].
So you could probably use that instead.
If you have only one column in your primary key then it will be at $_primary[1].
我认为这对你有用:-
public function delete($primaryKey)
{
$where = $this->getAdapter()->quoteInto($this->_primary[1] .' = ?', $primaryKey);
return parent::delete($where);
}
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