[英]Lithium: How to manually populate a DocumentSet?
如何从外部源作为DocumentSet返回数据?
我设置了一个自定义数据源来与Amazon的Product Advertising API交互。 为此,我将substantial lithium\\data\\source\\Http
子类化,并按照文档( http://li3.me/docs/manual/working-with-data/creating-data- sources.wiki )。
但是,我的锂版本(0.11,最新发行版)似乎没有示例中的强制转换方法,如果我创建一个强制转换方法,则当我return $this->item($model, $data, $options)
。
因此,我做了一个自定义item
函数,通过调用parent::item
来创建文档,就像文档示例对cast
所做的那样。 然后,在递归调用之后,我得到一个Document对象数组,最后一次调用parent::item
然后给了我一个空的DocumentSet对象 。 我应该如何传递数据以创建正确的DocumentSet?
这是我的代码的最小示例:
// 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);
}
我将跟踪master分支而不是发行版本。
在您的情况下,由于您要手动装箱对象,因此我将执行以下操作:
return $this->_instance('set', compact('data'));
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