{"id":40939,"date":"2023-09-05T04:10:54","date_gmt":"2022-10-30T10:55:08","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/elasticsearch-model%e7%9a%84import%e6%96%b9%e6%b3%95%e4%b8%ad%e7%9a%84transform%e5%8f%82%e6%95%b0%e9%9d%9e%e5%b8%b8%e6%9c%89%e7%94%a8%e3%80%82\/"},"modified":"2024-04-30T21:34:50","modified_gmt":"2024-04-30T13:34:50","slug":"elasticsearch-model%e7%9a%84import%e6%96%b9%e6%b3%95%e4%b8%ad%e7%9a%84transform%e5%8f%82%e6%95%b0%e9%9d%9e%e5%b8%b8%e6%9c%89%e7%94%a8%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/elasticsearch-model%e7%9a%84import%e6%96%b9%e6%b3%95%e4%b8%ad%e7%9a%84transform%e5%8f%82%e6%95%b0%e9%9d%9e%e5%b8%b8%e6%9c%89%e7%94%a8%e3%80%82\/","title":{"rendered":"“elasticsearch-model\u7684import\u65b9\u6cd5\u4e2d\u7684transform\u53c2\u6570\u975e\u5e38\u6709\u7528\u3002”"},"content":{"rendered":"

\u6211\u5728\u5de5\u4f5c\u4e2d\u6539\u8fdb\u641c\u7d22\u529f\u80fd\u65f6\u7684\u5907\u5fd8\u5f55\uff0c\u60f3\u516c\u5f00\u4e00\u4e9b\u4e0d\u5305\u542b\u673a\u5bc6\u4fe1\u606f\u7684\u90e8\u5206\u3002<\/p>\n

Hoge.__elasticsearch__.import\u7684\u5b9a\u4e49<\/h2>\n

\u603b\u7684\u6765\u8bf4<\/p>\n

          __find_in_batches<\/span>(<\/span>options<\/span>)<\/span> do<\/span> |<\/span>batch<\/span>|<\/span>\r\n            response<\/span> =<\/span> client<\/span>.<\/span>bulk<\/span> \\<\/span>\r\n                         index:   <\/span>target_index<\/span>,<\/span>\r\n                         type:    <\/span>target_type<\/span>,<\/span>\r\n                         body:    <\/span>__batch_to_bulk<\/span>(<\/span>batch<\/span>,<\/span> transform<\/span>)<\/span>\r\n\r\n            yield<\/span> response<\/span> if<\/span> block_given?<\/span>\r\n\r\n            errors<\/span> +=<\/span>  response<\/span>[<\/span>'items'<\/span>].<\/span>select<\/span> {<\/span> |<\/span>k<\/span>,<\/span> v<\/span>|<\/span> k<\/span>.<\/span>values<\/span>.<\/span>first<\/span>[<\/span>'error'<\/span>]<\/span> }<\/span>\r\n          end<\/span>\r\n<\/code><\/pre>\n
\u5728\u5185\u90e8\uff0c\u4f7f\u7528find_in_batch\u6bcf\u6b211000\u4e2a\uff0c\u4ee5bulk API\u5c06\u6570\u636e\u4e00\u6b21\u6027\u6279\u91cf\u63d2\u5165\u5230Elasticsearch\u4e2d\u662f\u4e00\u4e2a\u5f88\u68d2\u7684\u529f\u80fd\u3002 \uff08\u957f\u8bdd\u77ed\u8bf4\uff0cfind_in_batches\u9ed8\u8ba4\u662f1000\u662f\u7531ActiveRecord\u5b9a\u4e49\uff0c\u800c\u4e0d\u662fElasticsearch-model\u3002 https:\/\/github.com\/rails\/rails\/blob\/6-0-stable\/activerecord\/lib\/active_record\/relation\/batches.rb#L126 \uff09<\/p>\n
\u4e0d\u4ec5\u53ef\u4ee5\u4f7f\u7528\u6279\u91cf\u63d2\u5165\uff0c\u8fd8\u53ef\u4ee5\u8fdb\u884c\u66f4\u65b0\u548c\u5220\u9664\u3002<\/h3>\n
Elasticsearch\u7684\u6279\u91cfAPI\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u53ef\u4ee5<\/p>\n
[\r\n  { delete: { id: 123} },\r\n  { index: { id: 124, data: { title: elasticsearch-model\u304c\u4fbf\u5229, ......... } } },\r\n  { delete: { id: 125 } }\r\n]\r\n<\/code><\/pre>\n
\u5f53\u6307\u5b9a\u50cf\u8fd9\u6837\u7684\u6709\u6548\u8d1f\u8f7d\u65f6\uff0c<\/p>\n
    \n
  • \n
      123, 125\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3055\u308c\u3066\u3044\u305f\u3089\u524a\u9664\u3059\u308b(delete if exists)<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        124\u306f\u3001\u307e\u3060\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3055\u308c\u3066\u3044\u306a\u304b\u3063\u305f\u3089\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3059\u308b\uff08insert or update\uff09<\/ul>\n
        \u4e5f\u53ef\u4ee5\u505a\u4e00\u4e9b\u590d\u6742\u7684\u4e8b\u60c5\u3002<\/p>\n
        \u5728\u5148\u524d\u63d0\u5230\u7684import\u65b9\u6cd5\u4e2d\uff0c\u4f20\u9012\u7ed9bulk API\u7684payload\u662f\u901a\u8fc7body: __batch_to_bulk(batch, transform)\u5b9e\u73b0\u7684\uff0c\u5728\u8fdb\u4e00\u6b65\u67e5\u770b\u5176\u5b9a\u4e49\u65f6\u3002<\/p>\n
                def<\/span> __batch_to_bulk<\/span>(<\/span>batch<\/span>,<\/span> transform<\/span>)<\/span>\r\n          batch<\/span>.<\/span>map<\/span> {<\/span> |<\/span>model<\/span>|<\/span> transform<\/span>.<\/span>call<\/span>(<\/span>model<\/span>)<\/span> }<\/span>\r\n        end<\/span>\r\n<\/code><\/pre>\n
        \u770b\u8d77\u6765\u662f\u5c06transform\u5e94\u7528\u4e8e\u4e00\u4e2a\u540d\u4e3amodel\u7684\u5217\u8868\u3002<\/p>\n
        \u8fd9\u4e2atransform\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u5728https:\/\/github.com\/elastic\/elasticsearch-rails\/blob\/v6.0.0\/elasticsearch-model\/lib\/elasticsearch\/model\/adapters\/active_record.rb#L114\u4e2d\u5b9a\u4e49\u3002<\/p>\n
                  def<\/span> __transform<\/span>\r\n            lambda<\/span> {<\/span> |<\/span>model<\/span>|<\/span>  {<\/span> index: <\/span>{<\/span> _id: <\/span>model<\/span>.<\/span>id<\/span>,<\/span> data: <\/span>model<\/span>.<\/span>__elasticsearch__<\/span>.<\/span>as_indexed_json<\/span> }<\/span> }<\/span> }<\/span>\r\n          end<\/span>\r\n<\/code><\/pre>\n
        \u8fd9\u662f\u4e00\u79cd\u5c06\u6a21\u578b\u76f4\u63a5\u63d2\u5165\u6216\u66f4\u65b0\u7684\u8f6c\u6362\u65b9\u5f0f\u3002<\/p>\n
        \u5982\u679c\u5b58\u5728\u4e00\u79cd\u7c7b\u4f3c\u4e8e\u4e0b\u66f8\u304d\u8207\u516c\u958b\u5f8c\u4e0d\u5206\u5f00\u6a21\u578b\u7684\u6587\u7ae0\u6a21\u578b\uff0c\u5247\u9019\u7a2e\u8f49\u63db\u975e\u5e38\u5be6\u7528\u3002<\/p>\n
        # \u516c\u958b\u6e08\u307f\u306e\u8a18\u4e8b\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3059\u308b<\/span>\r\nArticle<\/span>.<\/span>__elasticsearch__<\/span>.<\/span>import<\/span>(<\/span>scope: :published<\/span>)<\/span>\r\n\r\n# \u4e0b\u66f8\u304d\u72b6\u614b\u306e\u3082\u306e\u3001\u516c\u958b\u5f8c\u306b\u4e0b\u66f8\u304d\u306b\u623b\u3055\u308c\u305f\u3082\u306e\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u3042\u308b\u5834\u5408\u306b\u306f\u524a\u9664\u3059\u308b<\/span>\r\nArticle<\/span>.<\/span>__elasticsearch__<\/span>.<\/span>import<\/span>(<\/span>\r\n  scope: :draft<\/span>,<\/span>\r\n  transform: <\/span>-><\/span>(<\/span>model<\/span>)<\/span> {<\/span>\r\n    {<\/span> delete: <\/span>{<\/span> _id: <\/span>model<\/span>.<\/span>id<\/span> }<\/span> }<\/span>\r\n  }<\/span>\r\n)<\/span>\r\n<\/code><\/pre>\n
        \u901a\u8fc7\u4f7f\u7528 transform \u53c2\u6570\uff0c\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u5c06\u5df2\u53d1\u5e03\u7684\u5185\u5bb9\u540c\u6b65\u5230 Elasticsearch \u4e2d\u3002<\/p>\n
        \u6216\u8005\uff0c\u53d6\u51b3\u4e8e\u53ef\u8bfb\u6027\u7684\u6743\u8861\u3002<\/p>\n
        \r\nArticle<\/span>.<\/span>__elasticsearch__<\/span>.<\/span>import<\/span>(<\/span>\r\n  transform: <\/span>lambda<\/span> do<\/span> |<\/span>article<\/span>|<\/span>\r\n    if<\/span> article<\/span>.<\/span>published?<\/span>\r\n      {<\/span> index: <\/span>{<\/span> _id: <\/span>article<\/span>.<\/span>id<\/span>,<\/span> data: <\/span>article<\/span>.<\/span>__elasticsearch__<\/span>.<\/span>as_indexed_json<\/span> }<\/span> }<\/span>\r\n    else<\/span>\r\n      {<\/span> delete: <\/span>{<\/span> _id: <\/span>article<\/span>.<\/span>id<\/span> }<\/span> }<\/span>\r\n    end<\/span>\r\n  end<\/span>\r\n)<\/span>\r\n<\/code><\/pre>\n
        \u5982\u679c\u8fd9\u6837\u505a\uff0c\u4f3c\u4e4e\u53ef\u4ee5\u51cf\u5c11\u8c03\u7528bulk API\u7684\u6b21\u6570\u81ea\u4f53\u3002<\/p>\n
        \u8bf7\u5c06\u4ee5\u4e0b\u5185\u5bb9\u7528\u4e2d\u6587\u8fdb\u884c\u540c\u4e49\u8f6c\u8ff0\uff0c\u53ea\u9700\u7ed9\u51fa\u4e00\u79cd\u9009\u9879\uff1a
        \nMichelle is excited to visit her grandparents in China during summer vacation.<\/p>\n
        \u9996\u5148\uff0c\u57282018\u5e74\u7248\u7684\u300cWeb\u670d\u52a1\uff08Rails\uff09+\u624b\u673a\u5e94\u7528\u7a0b\u5e8f\u7684\u5236\u4f5c\u65f6\u4e0d\u5e94\u8be5\u505a\u7684\u4e8b\u60c5\u300d\u4e2d\uff0c\u6211\u63d0\u5230\u4e86\u6a21\u578b\u5206\u79bb\u7684\u91cd\u8981\u6027\u3002\u4e0d\u8fc7\uff0c\u5f53\u5b58\u5728\u5386\u53f2\u7ecf\u9a8c\u7b49\u5404\u79cd\u539f\u56e0\u65e0\u6cd5\u5b9e\u73b0\u6a21\u578b\u5206\u79bb\u65f6\uff0c\u6211\u8ba4\u4e3atransform\u53c2\u6570\u662f\u975e\u5e38\u6709\u7528\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u6211\u5728\u5de5\u4f5c\u4e2d\u6539\u8fdb\u641c\u7d22\u529f\u80fd\u65f6\u7684\u5907\u5fd8\u5f55\uff0c\u60f3\u516c\u5f00\u4e00\u4e9b\u4e0d\u5305\u542b\u673a\u5bc6\u4fe1\u606f\u7684\u90e8\u5206\u3002 Hoge.__elasticsearch_ […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-40939","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n"elasticsearch-model\u7684import\u65b9\u6cd5\u4e2d\u7684transform\u53c2\u6570\u975e\u5e38\u6709\u7528\u3002" - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/elasticsearch-model\u7684import\u65b9\u6cd5\u4e2d\u7684transform\u53c2\u6570\u975e\u5e38\u6709\u7528\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\""elasticsearch-model\u7684import\u65b9\u6cd5\u4e2d\u7684transform\u53c2\u6570\u975e\u5e38\u6709\u7528\u3002"\" \/>\n<meta property=\"og:description\" content=\"\u6211\u5728\u5de5\u4f5c\u4e2d\u6539\u8fdb\u641c\u7d22\u529f\u80fd\u65f6\u7684\u5907\u5fd8\u5f55\uff0c\u60f3\u516c\u5f00\u4e00\u4e9b\u4e0d\u5305\u542b\u673a\u5bc6\u4fe1\u606f\u7684\u90e8\u5206\u3002 Hoge.__elasticsearch_ […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/elasticsearch-model\u7684import\u65b9\u6cd5\u4e2d\u7684transform\u53c2\u6570\u975e\u5e38\u6709\u7528\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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