(window.webpackJsonp=window.webpackJsonp||[]).push([[21],{339:function(s,t,a){"use strict";a.r(t);var n=a(6),e=Object(n.a)({},(function(){var s=this,t=s.$createElement,a=s._self._c||t;return a("ContentSlotsDistributor",{attrs:{"slot-key":s.$parent.slotKey}},[a("div",{staticClass:"custom-block tip"},[a("p",{staticClass:"custom-block-title"},[s._v("前言")]),s._v(" "),a("p",[s._v("ES底层是Lucene,由于Lucene实际上是不支持嵌套类型的,所有文档都是以扁平的结构存储在Lucene中,ES对嵌套文档的支持,实际上也是采取了一种投机取巧的方式实现的.")]),s._v(" "),a("p",[s._v("嵌套的文档均以独立的文档存入,然后添加关联关系,这就会导致,一条嵌套类型的文档,底层实际上存储了N条数据,而且更新时会株连九族式更新,导致效率低下,而且对于嵌套类型,其查询功能也受限,不支持聚合排序等功能,因此我们并不建议您在实际开发中使用这种类型.")]),s._v(" "),a("p",[s._v('ES本身更适合"大宽表"模式,不要带着传统关系型数据库那种思维方式去使用ES,我们完全可以通过把多张表中的字段和内容合并到一张表(一个索引)中,来完成期望功能,尽可能规避嵌套类型的使用,不仅效率高,功能也更强大.')]),s._v(" "),a("p",[s._v("当然存在即合理,也确实有个别场景下,不可避免的会用到嵌套类型,作为全球首屈一指的ES-ORM框架,我们对此也提供了支持,用户可以不用,但我们不能没有!")])]),s._v(" "),a("h2",{attrs:{id:"_1-前套类型创建索引"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#_1-前套类型创建索引"}},[s._v("#")]),s._v(" 1.前套类型创建索引")]),s._v(" "),a("ul",[a("li",[s._v("自动挡模式:")])]),s._v(" "),a("div",{staticClass:"language-java line-numbers-mode"},[a("pre",{pre:!0,attrs:{class:"language-java"}},[a("code",[s._v("    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("public")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Document")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 省略其它字段...")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("/**\n         * 嵌套类型 \n         */")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token annotation punctuation"}},[s._v("@TableField")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("fieldType "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token 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punctuation"}},[s._v(";")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n")])]),s._v(" "),a("div",{staticClass:"line-numbers-wrapper"},[a("span",{staticClass:"line-number"},[s._v("1")]),a("br"),a("span",{staticClass:"line-number"},[s._v("2")]),a("br"),a("span",{staticClass:"line-number"},[s._v("3")]),a("br"),a("span",{staticClass:"line-number"},[s._v("4")]),a("br"),a("span",{staticClass:"line-number"},[s._v("5")]),a("br"),a("span",{staticClass:"line-number"},[s._v("6")]),a("br"),a("span",{staticClass:"line-number"},[s._v("7")]),a("br"),a("span",{staticClass:"line-number"},[s._v("8")]),a("br")])]),a("div",{staticClass:"custom-block tip"},[a("p",{staticClass:"custom-block-title"},[s._v("注意")]),s._v(" "),a("p",[s._v("务必像上面示例一样指定类型为fieldType=NESTED及其nestedClass,否则会导致框架无法正常运行")])]),s._v(" "),a("ul",[a("li",[s._v("手动挡模式")]),s._v(" "),a("li",[s._v("方式一:\n按照自动挡模式,配置好注解,然后直接调用一键生成API生成索引 (v0.9.30+ 版本支持)")])]),s._v(" "),a("div",{staticClass:"language-java line-numbers-mode"},[a("pre",{pre:!0,attrs:{class:"language-java"}},[a("code",[s._v("documentMapper"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("createIndex")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(";")]),s._v("\n")])]),s._v(" "),a("div",{staticClass:"line-numbers-wrapper"},[a("span",{staticClass:"line-number"},[s._v("1")]),a("br")])]),a("ul",[a("li",[s._v("方式二:\n纯手工打造,所有字段自己安排一遍,不推荐,麻烦得很")])]),s._v(" "),a("div",{staticClass:"language-java line-numbers-mode"},[a("pre",{pre:!0,attrs:{class:"language-java"}},[a("code",[s._v("        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("LambdaEsIndexWrapper")]),a("span",{pre:!0,attrs:{class:"token generics"}},[a("span",{pre:!0,attrs:{class:"token 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punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("mapping")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Document")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("::")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getUsers")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("FieldType")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("NESTED"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n")])]),s._v(" "),a("div",{staticClass:"line-numbers-wrapper"},[a("span",{staticClass:"line-number"},[s._v("1")]),a("br"),a("span",{staticClass:"line-number"},[s._v("2")]),a("br"),a("span",{staticClass:"line-number"},[s._v("3")]),a("br")])]),a("div",{staticClass:"custom-block tip"},[a("p",{staticClass:"custom-block-title"},[s._v("注意")]),s._v(" "),a("p",[s._v("在手动挡模式下,除了要通过注解@TableField指定nestedClass外,还需要通过wrapper指定该嵌套字段,然后完成索引创建/更新")])]),s._v(" "),a("h2",{attrs:{id:"嵌套类型-crud"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#嵌套类型-crud"}},[s._v("#")]),s._v(" 嵌套类型 CRUD")]),s._v(" "),a("p",[s._v("其中增删改与非嵌套类型使用无差异,这里不赘述")]),s._v(" "),a("p",[s._v("查询示例:")]),s._v(" "),a("div",{staticClass:"language-java line-numbers-mode"},[a("pre",{pre:!0,attrs:{class:"language-java"}},[a("code",[s._v("    "),a("span",{pre:!0,attrs:{class:"token annotation punctuation"}},[s._v("@Test")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("public")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("void")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("testNestedMatch")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v('// 嵌套查询 查询内容匹配人才且嵌套数据中用户名匹配"用户1"的数据')]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 其中嵌套类的字段名称获取我们提供了工具类FieldUtils.val帮助用户通过lambda函数式获取字段名称,当然如果不想用也可以直接传字符串")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("EsWrappers")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("lambdaQuery")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Document")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n            "),a("span",{pre:!0,attrs:{class:"token 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"),a("div",{staticClass:"line-numbers-wrapper"},[a("span",{staticClass:"line-number"},[s._v("1")]),a("br"),a("span",{staticClass:"line-number"},[s._v("2")]),a("br"),a("span",{staticClass:"line-number"},[s._v("3")]),a("br"),a("span",{staticClass:"line-number"},[s._v("4")]),a("br"),a("span",{staticClass:"line-number"},[s._v("5")]),a("br"),a("span",{staticClass:"line-number"},[s._v("6")]),a("br"),a("span",{staticClass:"line-number"},[s._v("7")]),a("br"),a("span",{staticClass:"line-number"},[s._v("8")]),a("br"),a("span",{staticClass:"line-number"},[s._v("9")]),a("br"),a("span",{staticClass:"line-number"},[s._v("10")]),a("br")])]),a("p",[s._v("相关demo可参考源码的test模块->test目录->nested包")])])}),[],!1,null,null,null);t.default=e.exports}}]);