我想使用"More Like This"查询来查找类似的文档,并折叠字段"image"中具有相同值的文档。我试着使用字段折叠参数,但它们似乎不适用于"更像这样"。
下面是我的代码片段。你能告诉我如何使用"More Like This"查询来折叠结果吗?
$url = "http://{$host}:{$port}/solr/{$core}/mlt";
$data = [
'stream.body' => $content,
'fl' => 'image,content,title,signature',
'start' => 0,
'order' => "score desc",
'wt' => 'json',
'mlt.fl' => 'content,title',
// these lines do nothing ---v
'group' => 'true',
'group.field' => 'image',
'group.sort' => 'impressions desc',
'group.main' => 'true'
];
$curlHandle = curl_init($url);
$options = array (
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => $data
);
curl_setopt_array($curlHandle , $options);
$result = json_decode(curl_exec($curlHandle));
一般答案
我无法使用字段折叠参数折叠结果。然而,我能够使用CollapsingQParserPlugin实现所需的结果。以下过滤器查询将文档折叠在字段"图像"上,并选择字段"印象"值最高的文档:{!collapse field=image max=impressions}
实施
由于某些原因,我无法将此筛选器查询与其他筛选器查询组合在一个关键字下,如下所示:
$filterQueries = [
"-signature:{$signature}",
...
"{!collapse field=image max=impressions}"
];
$data = [
...
'fq' => implode(' AND ', $filterQueries),
...
];
这产生了错误:Query没有实现createWeight
我的解决方案是做一个GET请求(而不是上面问题中做的POST)。使用GET请求,可以为每个筛选器查询提供一个密钥:http://solr-url/mtl?...&fq=-签名%3A0&;fq=%7B!塌陷+场%3D图像+最大%3D印象%7D
以下是问题中片段的php解决方案:
$url = "http://{$host}:{$port}/solr/{$core}/mlt?"; // Note the added question mark
$data = [
'stream.body' => $content,
'fl' => 'image,content,title,signature',
'fq' => $filterQueries,
'start' => 0,
'order' => "score desc",
'wt' => 'json',
'mlt.fl' => 'content,title'
];
$params = [];
foreach ($data as $key=>$value) {
if (is_array($value)) {
foreach ($value as $subvalue) {
$subvalue = urlencode($subvalue);
$params[] = "{$key}={$subvalue}";
}
} else {
$value = urlencode($value);
$params[] = "{$key}={$value}";
}
}
$url .= implode('&', $params);
$curlHandle = curl_init($url);
$options = array ();
curl_setopt_array($curlHandle , $options);
$result = json_decode(curl_exec($curlHandle));