_id 字段
编辑_id
字段
编辑每个文档都有一个唯一的 _id
来标识它,该 _id
会被索引,以便可以使用 GET API 或 ids
查询来查找文档。 _id
可以在索引时分配,也可以由 Elasticsearch 生成一个唯一的 _id
。此字段在映射中是不可配置的。
在 term
、terms
、match
和 query_string
等查询中,可以访问 _id
字段的值。
resp = client.index( index="my-index-000001", id="1", document={ "text": "Document with ID 1" }, ) print(resp) resp1 = client.index( index="my-index-000001", id="2", refresh=True, document={ "text": "Document with ID 2" }, ) print(resp1) resp2 = client.search( index="my-index-000001", query={ "terms": { "_id": [ "1", "2" ] } }, ) print(resp2)
response = client.index( index: 'my-index-000001', id: 1, body: { text: 'Document with ID 1' } ) puts response response = client.index( index: 'my-index-000001', id: 2, refresh: true, body: { text: 'Document with ID 2' } ) puts response response = client.search( index: 'my-index-000001', body: { query: { terms: { _id: [ '1', '2' ] } } } ) puts response
{ res, err := es.Index( "my-index-000001", strings.NewReader(`{ "text": "Document with ID 1" }`), es.Index.WithDocumentID("1"), es.Index.WithPretty(), ) fmt.Println(res, err) } { res, err := es.Index( "my-index-000001", strings.NewReader(`{ "text": "Document with ID 2" }`), es.Index.WithDocumentID("2"), es.Index.WithRefresh("true"), es.Index.WithPretty(), ) fmt.Println(res, err) } { res, err := es.Search( es.Search.WithIndex("my-index-000001"), es.Search.WithBody(strings.NewReader(`{ "query": { "terms": { "_id": [ "1", "2" ] } } }`)), es.Search.WithPretty(), ) fmt.Println(res, err) }
const response = await client.index({ index: "my-index-000001", id: 1, document: { text: "Document with ID 1", }, }); console.log(response); const response1 = await client.index({ index: "my-index-000001", id: 2, refresh: "true", document: { text: "Document with ID 2", }, }); console.log(response1); const response2 = await client.search({ index: "my-index-000001", query: { terms: { _id: ["1", "2"], }, }, }); console.log(response2);
# Example documents PUT my-index-000001/_doc/1 { "text": "Document with ID 1" } PUT my-index-000001/_doc/2?refresh=true { "text": "Document with ID 2" } GET my-index-000001/_search { "query": { "terms": { "_id": [ "1", "2" ] } } }
在 |
_id
字段被限制用于聚合、排序和脚本。如果需要在 _id
字段上进行排序或聚合,建议将 _id
字段的内容复制到另一个启用了 doc_values
的字段中。
_id
的大小限制为 512 字节,更大的值将被拒绝。