当我使用"字段"查询的选项我为每个字段获得一个单独的数组。是否可以取回"完成"嵌套对象而不仅仅是字段?
在下面的示例中,如果我尝试"fields": ["cast"]
,它会告诉我,强制转换不是叶子节点。如果我"fields": ["cast.firstName", "cast.middleName", "cast.lastName"]
它返回3个数组。
是否有其他方法只检索部分数量的文档?或者有没有办法重新组装"将单独的字段分成完整的"演员"对象
示例索引和数据:
POST /movies
{
"mappings": {
"movie": {
"properties": {
"cast": {
"type": "nested"
}
}
}
}
}
POST /movies/movie
{
"title": "The Matrix",
"cast": [
{
"firstName": "Keanu",
"lastName": "Reeves",
"address": {
"street": "somewhere",
"city": "LA"
}
},
{
"firstName": "Laurence",
"middleName": "John",
"lastName": "Fishburne",
"address": {
"street": "somewhere else",
"city": "NYC"
}
}
]
}
示例查询:
GET /movies/_search
{
"query": {
"filtered": {
"query": {
"match_all": {}
},
"filter": {
"nested": {
"path": "cast",
"filter": {
"bool": {
"must": [
{ "term": { "firstName": "laurence"} },
{ "term": { "lastName": "fishburne"} }
]
}
}
}
}
}
},
"fields": [
"cast.address.city",
"cast.firstName",
"cast.middleName",
"cast.lastName"
]
}
示例查询的结果:
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 1,
"max_score": 1,
"hits": [
{
"_index": "movies",
"_type": "movie",
"_id": "AU1JeyBseLgwMCOuOLsZ",
"_score": 1,
"fields": {
"cast.firstName": [
"Keanu",
"Laurence"
],
"cast.lastName": [
"Reeves",
"Fishburne"
],
"cast.address.city": [
"LA",
"NYC"
],
"cast.middleName": [
"John"
]
}
}
]
}
}
答案 0 :(得分:5)
我认为这是你正在寻找的东西:
POST /movies/_search
{
"_source": {
"include": [
"cast.address.city",
"cast.firstName",
"cast.middleName",
"cast.lastName"
]
},
"query": {
"filtered": {
"query": {
"match_all": {}
},
"filter": {
"nested": {
"path": "cast",
"filter": {
"bool": {
"must": [
{
"term": {
"firstName": "laurence"
}
},
{
"term": {
"lastName": "fishburne"
}
}
]
}
}
}
}
}
}
}
结果:
{
"took": 2,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 1,
"max_score": 1,
"hits": [
{
"_index": "movies",
"_type": "movie",
"_id": "AU1PIJgBA_0Cyshym7-m",
"_score": 1,
"_source": {
"cast": [
{
"lastName": "Reeves",
"address": {
"city": "LA"
},
"firstName": "Keanu"
},
{
"middleName": "John",
"lastName": "Fishburne",
"address": {
"city": "NYC"
},
"firstName": "Laurence"
}
]
}
}
]
}
}
您也可以选择排除字段而不是包含字段或两者,请参阅此处的文档:http://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-source-filtering.html