[英]Lithium: How to manually populate a DocumentSet?
如何從外部源作為DocumentSet返回數據?
我設置了一個自定義數據源來與Amazon的Product Advertising API交互。 為此,我將substantial lithium\\data\\source\\Http
子類化,並按照文檔( http://li3.me/docs/manual/working-with-data/creating-data- sources.wiki )。
但是,我的鋰版本(0.11,最新發行版)似乎沒有示例中的強制轉換方法,如果我創建一個強制轉換方法,則當我return $this->item($model, $data, $options)
。
因此,我做了一個自定義item
函數,通過調用parent::item
來創建文檔,就像文檔示例對cast
所做的那樣。 然后,在遞歸調用之后,我得到一個Document對象數組,最后一次調用parent::item
然后給了我一個空的DocumentSet對象 。 我應該如何傳遞數據以創建正確的DocumentSet?
這是我的代碼的最小示例:
// Within class Amazon extends \lithium\data\source\Http
protected function _init() {
// Define entity classes.
$this->_classes += array(
'entity' => 'lithium\data\entity\Document',
'set' => 'lithium\data\collection\DocumentSet'
);
parent::_init();
}
public function read($query, array $options = array()) {
// Extract from query object.
$parameters = $query->export($this, array('keys' => array('conditions')));
$conditions = $parameters['conditions'];
// Code stripped to validate conditions and prepare Amazon request (that part works).
// results in a $queryString variable.
// Get response from Server.
$xml = simplexml_load_string($this->connection->get($this->_config['basePath'], $queryString));
// Stripped response validation and reformatting -> $items contains an array of SimpleXMLElement objects.
return $this->item($query->model(), $items, array('class' => 'set'));
}
public function item($model, array $data = array(), array $options = array()) {
// Recursively create Documents for arrays.
foreach($data as $key => $value) {
if(is_array($value)) {
$data[$key] = $this->item($model, $value, array('class' => 'entity'));
}
else if(is_object($value) && get_class($value) == "SimpleXMLElement") {
// Stripped code to extract data from XML object and put it in array $docData.
$data[$key] = $this->item($model, $docData, array('class' => 'entity'));
}
}
// Works perfectly for every (recursive) call with $options['class'] == 'entity' but fails for the final call with $options['class'] == 'set' (for this final call $data contains an array of Document objects).
return parent::item($model, $data, $options);
}
我將跟蹤master分支而不是發行版本。
在您的情況下,由於您要手動裝箱對象,因此我將執行以下操作:
return $this->_instance('set', compact('data'));
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