{"id":40772,"date":"2022-09-03T05:09:49","date_gmt":"2022-09-28T09:22:12","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/elasticsearch-rails%e7%9a%84%e6%9b%b4%e6%96%b0%e5%9b%9e%e8%b0%83%e5%a4%84%e7%90%86%e4%bb%a4%e4%ba%ba%e7%96%91%e6%83%91%e4%b8%8d%e8%a7%a3%e3%80%82\/"},"modified":"2024-01-15T10:45:17","modified_gmt":"2024-01-15T02:45:17","slug":"elasticsearch-rails%e7%9a%84%e6%9b%b4%e6%96%b0%e5%9b%9e%e8%b0%83%e5%a4%84%e7%90%86%e4%bb%a4%e4%ba%ba%e7%96%91%e6%83%91%e4%b8%8d%e8%a7%a3%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/elasticsearch-rails%e7%9a%84%e6%9b%b4%e6%96%b0%e5%9b%9e%e8%b0%83%e5%a4%84%e7%90%86%e4%bb%a4%e4%ba%ba%e7%96%91%e6%83%91%e4%b8%8d%e8%a7%a3%e3%80%82\/","title":{"rendered":"elasticsearch-rails\u7684\u66f4\u65b0\u56de\u8c03\u5904\u7406\u4ee4\u4eba\u7591\u60d1\u4e0d\u89e3"},"content":{"rendered":"<p>\u5728\u4f7f\u7528elasticsearch-rails\u65f6\uff0c\u51fa\u73b0\u4e86\u66f4\u65b0\u540e\u65e0\u6cd5\u5728Elasticsearch\u4e2d\u53cd\u6620\u7684\u95ee\u9898\uff0c\u4ee5\u4e0b\u662f\u6211\u5f53\u65f6\u67e5\u627e\u5230\u7684\u5907\u5fd8\u3002<\/p>\n<p>\u770b\u4e00\u4e0belasticsearch-rails\u7684\u95ee\u9898\uff0c<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">#5<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">#37<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">#52<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">#125<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">#182<\/ul>\n<p>\u7ecf\u8fc7\u8ba8\u8bba\uff0c\u622a\u81f32014-12-08\uff0c\u4f3c\u4e4e\u5df2\u7ecf\u786e\u5b9a\u4e86\u4ee5\u4e0b\u5b9e\u65bd\u65b9\u6848\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\"># https:\/\/github.com\/elasticsearch\/elasticsearch-rails\/blob\/master\/elasticsearch-model\/lib\/elasticsearch\/model\/indexing.rb#L338<\/span>\r\n\r\n<span class=\"k\">def<\/span> <span class=\"nf\">update_document<\/span><span class=\"p\">(<\/span><span class=\"n\">options<\/span><span class=\"o\">=<\/span><span class=\"p\">{})<\/span>\r\n  <span class=\"k\">if<\/span> <span class=\"n\">changed_attributes<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">self<\/span><span class=\"p\">.<\/span><span class=\"nf\">instance_variable_get<\/span><span class=\"p\">(<\/span><span class=\"ss\">:@__changed_attributes<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">attributes<\/span> <span class=\"o\">=<\/span> <span class=\"k\">if<\/span> <span class=\"nb\">respond_to?<\/span><span class=\"p\">(<\/span><span class=\"ss\">:as_indexed_json<\/span><span class=\"p\">)<\/span>\r\n      <span class=\"nb\">self<\/span><span class=\"p\">.<\/span><span class=\"nf\">as_indexed_json<\/span><span class=\"p\">.<\/span><span class=\"nf\">select<\/span> <span class=\"p\">{<\/span> <span class=\"o\">|<\/span><span class=\"n\">k<\/span><span class=\"p\">,<\/span><span class=\"n\">v<\/span><span class=\"o\">|<\/span> <span class=\"n\">changed_attributes<\/span><span class=\"p\">.<\/span><span class=\"nf\">keys<\/span><span class=\"p\">.<\/span><span class=\"nf\">map<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"ss\">:to_s<\/span><span class=\"p\">).<\/span><span class=\"nf\">include?<\/span> <span class=\"n\">k<\/span><span class=\"p\">.<\/span><span class=\"nf\">to_s<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"k\">else<\/span>\r\n      <span class=\"n\">changed_attributes<\/span>\r\n    <span class=\"k\">end<\/span>\r\n\r\n    <span class=\"n\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">update<\/span><span class=\"p\">(<\/span>\r\n      <span class=\"p\">{<\/span> <span class=\"ss\">index: <\/span><span class=\"n\">index_name<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">type:  <\/span><span class=\"n\">document_type<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">id:    <\/span><span class=\"nb\">self<\/span><span class=\"p\">.<\/span><span class=\"nf\">id<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">body:  <\/span><span class=\"p\">{<\/span> <span class=\"ss\">doc: <\/span><span class=\"n\">attributes<\/span> <span class=\"p\">}<\/span> <span class=\"p\">}.<\/span><span class=\"nf\">merge<\/span><span class=\"p\">(<\/span><span class=\"n\">options<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">)<\/span>\r\n  <span class=\"k\">else<\/span>\r\n    <span class=\"n\">index_document<\/span><span class=\"p\">(<\/span><span class=\"n\">options<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u6839\u636e @__changed_attributes \u548c as_indexed_json \u8fdb\u884c\u5bf9\u7167\uff0c\u786e\u8ba4\u54ea\u4e9b\u5c5e\u6027\u5df2\u7ecf\u66f4\u65b0\uff0c\u5982\u679c\u6ca1\u6709\u66f4\u65b0\u5219\u4f7f\u7528 @__changed_attributes \u8fdb\u884c\u5904\u7406\u3002\u800c @__changed_attributes \u662f\u4ec0\u4e48\u5462\uff0c<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\"># https:\/\/github.com\/elasticsearch\/elasticsearch-rails\/blob\/4a61f1786696045561864567e0921db9b318aeaa\/elasticsearch-model\/lib\/elasticsearch\/model\/proxy.rb#L62<\/span>\r\n\r\n<span class=\"n\">before_save<\/span> <span class=\"k\">do<\/span> <span class=\"o\">|<\/span><span class=\"n\">i<\/span><span class=\"o\">|<\/span>\r\n  <span class=\"n\">i<\/span><span class=\"p\">.<\/span><span class=\"nf\">__elasticsearch__<\/span><span class=\"p\">.<\/span><span class=\"nf\">instance_variable_set<\/span><span class=\"p\">(<\/span><span class=\"ss\">:@__changed_attributes<\/span><span class=\"p\">,<\/span>\r\n                                            <span class=\"no\">Hash<\/span><span class=\"p\">[<\/span> <span class=\"n\">i<\/span><span class=\"p\">.<\/span><span class=\"nf\">changes<\/span><span class=\"p\">.<\/span><span class=\"nf\">map<\/span> <span class=\"p\">{<\/span> <span class=\"o\">|<\/span><span class=\"n\">key<\/span><span class=\"p\">,<\/span> <span class=\"n\">value<\/span><span class=\"o\">|<\/span> <span class=\"p\">[<\/span><span class=\"n\">key<\/span><span class=\"p\">,<\/span> <span class=\"n\">value<\/span><span class=\"p\">.<\/span><span class=\"nf\">last<\/span><span class=\"p\">]<\/span> <span class=\"p\">}<\/span> <span class=\"p\">])<\/span>\r\n<span class=\"k\">end<\/span> <span class=\"k\">if<\/span> <span class=\"nb\">respond_to?<\/span><span class=\"p\">(<\/span><span class=\"ss\">:before_save<\/span><span class=\"p\">)<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nb\">instance_methods<\/span><span class=\"p\">.<\/span><span class=\"nf\">include?<\/span><span class=\"p\">(<\/span><span class=\"ss\">:changed_attributes<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u6267\u884csave\u4e4b\u524d\uff0cbefore_save\u5c06\u5728ActiveModel::Dirty\u4e2d\u8bbe\u7f6e\u5e76\u4fdd\u5b58\u5b9e\u4f53\u7684\u503c\u3002<\/p>\n<p>\u6362\u53e5\u8bdd\u8bf4\uff0c\u5728\u6267\u884cbefore_save\u4e4b\u540e\u6539\u53d8\u7684\u5c5e\u6027\u4e0d\u4f1a\u88ab\u68c0\u6d4b\u5230\u66f4\u65b0\uff0c\u56e0\u6b64\u5982\u679c\u5728\u5176\u4ed6before_save\u4e2d\u4fee\u6539\u4e86\u5c5e\u6027\uff0c\u8be5\u5c5e\u6027\u5c31\u4e0d\u4f1a\u88ab\u66f4\u65b0\u3002<br \/>\nbefore_save\u7684\u6267\u884c\u987a\u5e8f\u9075\u5faaRails\u56de\u8c03\u51fd\u6570\u7efc\u8ff0\u6587\u7ae0\u4e2d\u7684\u89c4\u5b9a\uff0c\u5982\u679c\u6709\u591a\u4e2a\u76f8\u540c\u7684before_save\u6307\u5b9a\uff0c\u5b83\u4eec\u5c06\u6309\u7167\u4ece\u4e0a\u5230\u4e0b\u7684\u987a\u5e8f\u6267\u884c\uff0c\u56e0\u6b64\uff0c\u6211\u8ba4\u4e3a\u6700\u597d\u5c06Elasticsearch::Model\u548cElasticsearch::Model::Callbacks\u90fd\u653e\u5728\u6700\u540einclude\u8fdb\u6765\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nb\">require<\/span> <span class=\"s1\">'elasticsearch\/model'<\/span>\r\n\r\n<span class=\"k\">class<\/span> <span class=\"nc\">Article<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">ActiveRecord<\/span><span class=\"o\">::<\/span><span class=\"no\">Base<\/span>\r\n\r\n  <span class=\"n\">before_save<\/span> <span class=\"ss\">:update_pv_count<\/span>\r\n\r\n  <span class=\"k\">def<\/span> <span class=\"nf\">update_pv_count<\/span>\r\n    <span class=\"nb\">self<\/span><span class=\"p\">.<\/span><span class=\"nf\">pv_count<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">1<\/span>\r\n    <span class=\"kp\">true<\/span>\r\n  <span class=\"k\">end<\/span>\r\n\r\n  <span class=\"o\">...<\/span>\r\n\r\n  <span class=\"kp\">include<\/span> <span class=\"no\">Elasticsearch<\/span><span class=\"o\">::<\/span><span class=\"no\">Model<\/span>\r\n  <span class=\"kp\">include<\/span> <span class=\"no\">Elasticsearch<\/span><span class=\"o\">::<\/span><span class=\"no\">Model<\/span><span class=\"o\">::<\/span><span class=\"no\">Callbacks<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u8ba4\u4e3a\u4e4b\u6240\u4ee5\u91c7\u7528\u8fd9\u79cd\u5b9e\u73b0\u662f\u4e3a\u4e86\u5b9e\u73b0\u53ea\u66f4\u65b0\u66f4\u65b0\u7684\u5c5e\u6027\u5e76\u4f7f\u5176\u4e0eElasticsearch\u4fdd\u6301\u540c\u6b65\u7684\u8282\u7701\u8d44\u6e90\u7684\u5b9e\u73b0\uff0c\u4f46\u5728\u8fd0\u8425\u4e2d\uff0c\u7531\u4e8e\u9700\u8981\u9891\u7e41\u8986\u76d6as_indexed_json\u51fd\u6570\uff0c\u6211\u8ba4\u4e3a\u8fd9\u79cd\u901a\u7528\u5904\u7406\u65b9\u5f0f\u5e76\u4e0d\u80fd\u89e3\u51b3\u95ee\u9898\u3002\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5728\u7b2c5\u4e2a\u95ee\u9898\u4e2d\uff0c<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">after_update<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">__elasticsearch__<\/span><span class=\"p\">.<\/span><span class=\"nf\">index_document<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6240\u4ee5\uff0c\u6709\u4e00\u4e9b\u4eba\u6b63\u5e38\u5730\u9032\u884c\u66f4\u65b0\u8655\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4f7f\u7528elasticsearch-rails\u65f6\uff0c\u51fa\u73b0\u4e86\u66f4\u65b0\u540e\u65e0\u6cd5\u5728Elasticsearch\u4e2d\u53cd\u6620\u7684\u95ee\u9898\uff0c\u4ee5\u4e0b [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-40772","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>elasticsearch-rails\u7684\u66f4\u65b0\u56de\u8c03\u5904\u7406\u4ee4\u4eba\u7591\u60d1\u4e0d\u89e3 - Blog - Silicon 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