Spring Data ElasticSearch parnt/child search

http://stackoverflow.com/questions/23730641/parent-child-relationships-in-spring-data-elastic-search

 

父实体类及子实体类的搜索方法如下：

@Document(indexName = "parent-child", type = "parent-entity")
   public class ParentEntity {


    @Id
    private String id;
    @Field(type = FieldType.String, index = FieldIndex.analyzed, store = true)
    private String name;
        // setter/getter

   public ParentEntity() {
   }

   public ParentEntity(String id, String name) {
     this.id = id;
     this.name = name;
   }
   }


  @Document(indexName = "parent-child", type = "child-entity")
  public class ChildEntity {

    @Id
    private String id;
    @Field(type = FieldType.String, store = true)
    @Parent(type = "parent-entity")
    private String parentId;
    @Field(type = FieldType.String, index = FieldIndex.analyzed, store = true)
    private String name;

    public ChildEntity() {
    }

    public ChildEntity(String id, String parentId, String name) {
     this.id = id;
     this.parentId = parentId;
     this.name = name;
    }
     }

// 为父实体类做索引(你还可以使用许多其它的方法做索引 例如： repositories)

ParentEntity parent1 = new ParentEntity("parent1", "First Parent");
    IndexQuery parentIndex1 = new IndexQuery();
    parentIndex1.setId(parent1.getId());
    parentIndex1.setObject(parent1);
    elasticsearchTemplate.index(parentIndex1);

    ParentEntity parent2 = new ParentEntity("parent2", "Second Parent");
    IndexQuery parentIndex2 = new IndexQuery();
    parentIndex2.setId(parent2.getId());
    parentIndex2.setObject(parent2);
    elasticsearchTemplate.index(parentIndex2);

// 为子实体类做索引

ChildEntity child1 = new ChildEntity("child1", parent1.getId(), "First");
    IndexQuery childIndex1 = new IndexQuery();
    childIndex1.setId(child1.getId());
    childIndex1.setObject(child1);
    childIndex1.setParentId(child1.getParentId());
    elasticsearchTemplate.index(childIndex1);

    ChildEntity child2 = new ChildEntity("child2", parent1.getId(), "Second");
    IndexQuery childIndex2 = new IndexQuery();
    childIndex2.setId(child2.getId());
    childIndex2.setObject(child2);
    childIndex2.setParentId(child2.getParentId());
    elasticsearchTemplate.index(childIndex2);

//搜索

对于主从结构的实体类，有三种可选的搜索方法：

1.has children 点击打开链接

2.has parent  点击打开链接

3.top children  点击打开链接

 

QueryBuilder query = topChildrenQuery("child-entity", QueryBuilders.termQuery("name", child1name.toLowerCase()));
    SearchQuery searchQuery = new NativeSearchQueryBuilder().withQuery(query).build();

    List<ParentEntity> parents = elasticsearchTemplate.queryForList(searchQuery, ParentEntity.class);