带有嵌套字段和映射的 Spring Data 弹性搜索 [英] Spring Data Elastic Search with Nested Fields and mapping

问题描述

我同时使用 spring-data-elasticsearch 和 elasticsearch 来查询文档.我想对嵌套文档进行嵌套查询.

I am using spring-data-elasticsearch and elasticsearch together to query documents. I'd like to do nested queries on nested documents.

我在java中有这个:

I have this in java :

@Document(indexName = "as", type = "a", indexStoreType = "memory", shards = 1, replicas = 0, refreshInterval = "-1")
class A {

     @Id
     private String Id;

     @Field(type = String, index = analyzed, store = true)
     private String field1;

     // ... Many more Fields.

     @NestedField(type = FieldType.Object, index = analyzed, store = true, dotSuffix = "accounts")
     private List<B> bs;

     // ... getters and setters
}

还有

class B { // some normal pojo }

当我让 spring-data 做映射时，我得到:

When I let spring-data do the mapping, I get :

"a": {
    "properties": {
        "bs": {
            "properties": {
                "someBProperty": {
                    "type": "string"
                },
                "BId": {
                    "type": "string"
                }
            }
        },
        "id": { ... },
        ...
}

当我尝试查询文档时，我遇到了经典的内部与嵌套文档问题，并且它无法识别嵌套元素.

When I am trying to query the document, I get the classical inner vs nested documents problems and it doesn't recognize the nested element.

当我尝试更新映射以使用嵌套文档时，我得到无法从非嵌套更改为嵌套".

When I try to update mapping to use nested document I get "can't be changed from non-nested to nested".

我应该以某种方式告诉 spring-data-es @NestedField => type: "nested" into mapping 吗?有没有办法在创建索引时向 spring-data 添加自定义映射 &映射?

Should I tell spring-data-es somehow that @NestedField => type: "nested" into mapping ? Is there a way to add custom mapping to spring-data when it create index & mapping ?

此外，我正在通过以下方式初始化索引:

Also, I am initializing indexes via :

elasticsearchTemplate.deleteIndex(A.class);
elasticsearchTemplate.createIndex(A.class);
elasticsearchTemplate.putMapping(A.class);
elasticsearchTemplate.refresh(A.class,true);

然后使用 spring-data 存储库查询:

And then querying using spring-data repository :

QueryBuilder builder = QueryBuilders.nestedQuery( "bs", QueryBuilders.boolQuery().must(QueryBuilders.matchQuery("as.field1", "A1")).must(QueryBuilders.matchQuery("as.field2", "B1")));

Iterable<DenormalizedRelationshipDocument> res = aRepository.search(builder);

这里的 res 在 Iterable 中有 0 个元素，但通过 REST 我得到了不支持嵌套查询的错误(因为我在映射中没有它).

Here the res has 0 element in the Iterable but via REST I get the error on the nested query not supported (as I don't have it in mapping).

最后，

Spring-Data-ElasticSearch 是否支持通过 ES QueryBuilders API 进行嵌套映射?我应该什么时候进行映射?

Does Spring-Data-ElasticSearch supports nested mappings via ES QueryBuilders API ? When should I make that mapping happens ?

推荐答案

Spring data elasticsearch 现在支持 Elasticsearch 的大部分常用功能集，包括 Nested、Inner Objects 和 Parent Child(最近)

Spring data elasticsearch now supports most of the common feature set of elasticsearch including Nested, Inner Objects and Parent Child(recently)

详细解释可以在在elasticsearch中管理关系

嵌套文档示例

个人实体

   @Document( indexName = "person" , type = "user")

    public class Person {

        @Id
        private String id;

        private String name;

        @Field( type = FieldType.Nested)
        private List<Car> car;

        // setters-getters

    }

汽车实体

    public class Car {
    private String name;
    private String model;
    //setters and getters 
    }

设置数据

    Person foo = new Person();
    foo.setName("Foo");
    foo.setId("1");

    List cars = new ArrayList();
    Car subaru = new Car();
    subaru.setName("Subaru");
    subaru.setModel("Imprezza");
    cars.add(subaru);
    foo.setCar(cars);

索引

        IndexQuery indexQuery = new IndexQuery();
        indexQuery.setId(foo.getId());
        indexQuery.setObject(foo);

       //creating mapping
       elasticsearchTemplate.putMapping(Person.class);
       //indexing document
       elasticsearchTemplate.index(indexQuery);
       //refresh
       elasticsearchTemplate.refresh(Person.class, true);

搜索

 

    QueryBuilder builder = nestedQuery("car", boolQuery().must(termQuery("car.name",      "subaru")).must(termQuery("car.model", "imprezza")));

    SearchQuery searchQuery = new NativeSearchQueryBuilder().withQuery(builder).build();
    List persons = elasticsearchTemplate.queryForList(searchQuery, Person.class);

你可以在 嵌套对象测试

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