從Ruby使用Solr

從Ruby使用Solr

Solr有一個(gè)可選的Ruby響應(yīng)格式，它擴(kuò)展了JSON輸出以允許Ruby的解釋器安全地評(píng)估響應(yīng)。

這種Ruby響應(yīng)格式與JSON的不同之處在于：

• Ruby的單引號(hào)字符串用于防止可能的字符串利用：
  • \ 和 ' 是僅有的兩個(gè)轉(zhuǎn)義字符；
  • unicode轉(zhuǎn)義不使用,數(shù)據(jù)被寫為原始的UTF-8
• nil 用于 null
• => 用作映射中的鍵/值（key/value）分隔符

下面是一個(gè)來自Solr的Ruby響應(yīng)示例，其中包含一個(gè)請(qǐng)求：http://localhost:8983/solr/techproducts/select?q=iPod&wt=ruby&indent=on（使用Solr啟動(dòng)bin/solr start -e techproducts）：

{
  'responseHeader'=>{
    'status'=>0,
    'QTime'=>0,
    'params'=>{
      'q'=>'iPod',
      'indent'=>'on',
      'wt'=>'ruby'}},
  'response'=>{'numFound'=>3,'start'=>0,'docs'=>[
      {
        'id'=>'IW-02',
        'name'=>'iPod & iPod Mini USB 2.0 Cable',
        'manu'=>'Belkin',
        'manu_id_s'=>'belkin',
        'cat'=>['electronics',
          'connector'],
        'features'=>['car power adapter for iPod, white'],
        'weight'=>2.0,
        'price'=>11.5,
        'price_c'=>'11.50,USD',
        'popularity'=>1,
        'inStock'=>false,
        'store'=>'37.7752,-122.4232',
        'manufacturedate_dt'=>'2006-02-14T23:55:59Z',
        '_version_'=>1491038048794705920},
      {
        'id'=>'F8V7067-APL-KIT',
        'name'=>'Belkin Mobile Power Cord for iPod w/ Dock',
        'manu'=>'Belkin',
        'manu_id_s'=>'belkin',
        'cat'=>['electronics',
          'connector'],
        'features'=>['car power adapter, white'],
        'weight'=>4.0,
        'price'=>19.95,
        'price_c'=>'19.95,USD',
        'popularity'=>1,
        'inStock'=>false,
        'store'=>'45.18014,-93.87741',
        'manufacturedate_dt'=>'2005-08-01T16:30:25Z',
        '_version_'=>1491038048792608768},
      {
        'id'=>'MA147LL/A',
        'name'=>'Apple 60 GB iPod with Video Playback Black',
        'manu'=>'Apple Computer Inc.',
        'manu_id_s'=>'apple',
        'cat'=>['electronics',
          'music'],
        'features'=>['iTunes, Podcasts, Audiobooks',
          'Stores up to 15,000 songs, 25,000 photos, or 150 hours of video',
          '2.5-inch, 320x240 color TFT LCD display with LED backlight',
          'Up to 20 hours of battery life',
          'Plays AAC, MP3, WAV, AIFF, Audible, Apple Lossless, H.264 video',
          'Notes, Calendar, Phone book, Hold button, Date display, Photo wallet, Built-in games, JPEG photo playback, Upgradeable firmware, USB 2.0 compatibility, Playback speed control, Rechargeable capability, Battery level indication'],
        'includes'=>'earbud headphones, USB cable',
        'weight'=>5.5,
        'price'=>399.0,
        'price_c'=>'399.00,USD',
        'popularity'=>10,
        'inStock'=>true,
        'store'=>'37.7752,-100.0232',
        'manufacturedate_dt'=>'2005-10-12T08:00:00Z',
        '_version_'=>1491038048799948800}]
  }}

下面是一個(gè)簡(jiǎn)單的例子，說明如何使用Ruby響應(yīng)格式來查詢Solr：

require 'net/http'

h = Net::HTTP.new('localhost', 8983)
http_response = h.get('/solr/techproducts/select?q=iPod&wt=ruby')
rsp = eval(http_response.body)

puts 'number of matches = ' + rsp['response']['numFound'].to_s
#print out the name field for each returned document
rsp['response']['docs'].each { |doc| puts 'name field = ' + doc['name'] }

對(duì)于與Solr的簡(jiǎn)單交互，這可能是所有你需要的！如果您正在使用Solr建立復(fù)雜的交互，請(qǐng)參考：https://wiki.apache.org/solr/Ruby%20Response%20Format