SolrをPHPで使う(検索編)
前回の記事でSolrをPHPから使う準備ができました。
今回はPHPで Solr の検索を実行する方法です。
検索結果のオブジェクトは以下のような構造になっています。
SolrObject Object
(
[responseHeader] => SolrObject Object
(
[zkConnected] => 1
[status] => 0
[QTime] => 0
[params] => SolrObject Object
(
[q] => *:*
[indent] => on
[start] => 0
[rows] => 2
[version] => 2.2
[wt] => xml
)
)
[response] => SolrObject Object
(
[numFound] => 52
[start] => 0
[docs] => Array
(
[0] => SolrDocument Object
(
[_hashtable_index:SolrDocument:private] => 24804
)
[1] => SolrDocument Object
(
[_hashtable_index:SolrDocument:private] => 5340
)
)
)
)
docs という配列の要素である SolrDocument オブジェクトは SolrDocumentField オブジェクトを複数含んでいます。SolrDocument 内のすべての SolrDocumentField をたどるために current() や next() などのメソッドを利用します。
SolrObject ベースの検索結果は意外と扱いづらいので、JSON で扱えるようにしてみます。
SolrClient 作成時のオプションとして wt=json を追加しています。
getRawResponse() の応答は以下の通りです。
{
"responseHeader":{
"zkConnected":true,
"status":0,
"QTime":0,
"params":{
"q":"*:*",
"indent":"on",
"start":"0",
"rows":"2",
"version":"2.2",
"wt":"json"}},
"response":{"numFound":52,"start":0,"numFoundExact":true,"docs":[
{
"id":"0553573403",
"cat":["book"],
"name":"A Game of Thrones",
"price":7.99,
"price_c":"7.99,USD",
"inStock":true,
"author":"George R.R. Martin",
"author_s":"George R.R. Martin",
"series_t":"A Song of Ice and Fire",
"sequence_i":1,
"genre_s":"fantasy",
"_version_":1730974266238697472,
"price_c____l_ns":799},
{
"id":"0553579908",
"cat":["book"],
"name":"A Clash of Kings",
"price":7.99,
"price_c":"7.99,USD",
"inStock":true,
"author":"George R.R. Martin",
"author_s":"George R.R. Martin",
"series_t":"A Song of Ice and Fire",
"sequence_i":2,
"genre_s":"fantasy",
"_version_":1730974266279591936,
"price_c____l_ns":799}]
}}
これを json_decode() することで、通常の PHP 配列として扱うことができます。
Array
(
[responseHeader] => Array
(
[zkConnected] => 1
[status] => 0
[QTime] => 0
[params] => Array
(
[q] => *:*
[indent] => on
[start] => 0
[rows] => 2
[version] => 2.2
[wt] => json
)
)
[response] => Array
(
[numFound] => 52
[start] => 0
[numFoundExact] => 1
[docs] => Array
(
[0] => Array
(
[id] => 0553573403
[cat] => Array
(
[0] => book
)
[name] => A Game of Thrones
[price] => 7.99
[price_c] => 7.99,USD
[inStock] => 1
[author] => George R.R. Martin
[author_s] => George R.R. Martin
[series_t] => A Song of Ice and Fire
[sequence_i] => 1
[genre_s] => fantasy
[_version_] => 1730974266238697472
[price_c____l_ns] => 799
)
[1] => Array
(
[id] => 0553579908
[cat] => Array
(
[0] => book
)
[name] => A Clash of Kings
[price] => 7.99
[price_c] => 7.99,USD
[inStock] => 1
[author] => George R.R. Martin
[author_s] => George R.R. Martin
[series_t] => A Song of Ice and Fire
[sequence_i] => 2
[genre_s] => fantasy
[_version_] => 1730974266279591936
[price_c____l_ns] => 799
)
)
)
)