我正在为Elgg开发一个插件,该插件可以跟踪从手机登录时发送到应用程序的设备ID。为此,我想将这些设备ID存储在数据库中,并希望为此使用ElggObjects。
这就是我现在所做的:
function initialize() {
$androidTokens = elgg_get_entities(array(
'type' => 'object',
'subtype' => 'androidTokens',
'limit' => 0
));
$iosTokens = elgg_get_entities(array(
'type' => 'object',
'subtype' => 'iosTokens',
'limit' => 0
));
if ($androidTokens == 0) {
$tokenObject = new ElggObject();
$tokenObject->subtype = 'androidTokens';
$tokenObject->tags = array();
$tokenObject->save();
}
if ($iosTokens == 0) {
$tokenObject = new ElggObject();
$tokenObject->subtype = 'iosTokens';
$tokenObject->tags = array();
$tokenObject->save();
}
}
因此,这会生成两个ElggObjects,它们保存android和ios设备的id,存储在元数据字段标记中。但是,无法再检索此标签数组。当我这样做时:
$tokenObject = elgg_get_entities(array(
'type' => 'object',
'subtype' => $os.'Tokens',
'limit' => 0
));
$tokens = $tokenObject->tags
令牌保持为空。有人知道我做错了什么吗?我用错埃尔格物体了吗?
我认为您在那里遇到问题的原因是elgg_get_entities返回了一个实体数组。
我假设每个令牌对象子类型中只有一个是正确的吗?(一个用于iOS,一个用于Android?)
如果是这样的话,我会修改你的代码如下:
function initialize() {
$androidTokens = elgg_get_entities(array(
'type' => 'object',
'subtype' => 'androidTokens',
'limit' => 1 // only expecting one entity
));
$iosTokens = elgg_get_entities(array(
'type' => 'object',
'subtype' => 'iosTokens',
'limit' => 1 // only expecting one entity
));
if (count($androidTokens) == 0) {
$tokenObject = new ElggObject();
$tokenObject->subtype = 'androidTokens';
$tokenObject->tags = array();
$tokenObject->save();
}
if (count($iosTokens) == 0) {
$tokenObject = new ElggObject();
$tokenObject->subtype = 'iosTokens';
$tokenObject->tags = array();
$tokenObject->save();
}
}
稍后,当抓取实体时:
$tokenObject = elgg_get_entities(array(
'type' => 'object',
'subtype' => $os.'Tokens',
'limit' => 1 // only grab one
));
$tokens = $tokenObject[0]->tags; // get tag data for first (and only) entity