实现这一目标的一种方法是使用多字段 https://www.elastic.co/guide/en/elasticsearch/reference/current/_multi_fields.html映射为description
场地。多字段中的字段之一不应被分析。
一旦数据被重新索引,您可以使用一个简单的布尔查询 https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-bool-query.html实现你想要的:
Example
创建索引:
put test
{
"mappings": {
"data" : {
"properties": {
"description" : {
"type": "string",
"fields": {
"raw" : {"type": "string","index": "not_analyzed"}
}
}
}
}
}
}
指数数据:
put test/data/1
{
"description" : "a",
"test_id" : 10
}
put test/data/2
{
"description" : "",
"test_id" : 10
}
put test/data/3
{
"description" : "hello",
"test_id" : 10
}
put test/data/4
{
"description": "a",
"test_id" : 20
}
Query:
post test/data/_search
{
"query": {
"filtered": {
"query": {
"bool": {
"disable_coord": "true",
"should": [
{
"query_string": {
"fields": [
"description"
],
"query": "a"
}
},
{
"constant_score": {
"filter": {
"term": {
"description.raw": ""
}
},
"boost": 0.2
}
},
{
"constant_score": {
"filter": {
"exists": {
"field": "description"
}
},
"boost": 0.1
}
}
]
}
},
"filter": {
"terms": {
"test_id": [
10
]
}
}
}
}
}
结果 :
"hits": [
{
"_index": "test",
"_type": "data",
"_id": "1",
"_score": 0.5113713,
"_source": {
"description": "a",
"test_id": 10
}
},
{
"_index": "test",
"_type": "data",
"_id": "2",
"_score": 0.29277003,
"_source": {
"description": "",
"test_id": 10
}
},
{
"_index": "test",
"_type": "data",
"_id": "3",
"_score": 0.097590014,
"_source": {
"description": "hello",
"test_id": 10
}
}
]
查询空字符串:
{
"query": {
"filtered": {
"query": {
"bool": {
"disable_coord": "true",
"should": [
{
"query_string": {
"fields": [
"description"
],
"query": ""
}
},
{
"constant_score": {
"filter": {
"term": {
"description.raw": ""
}
},
"boost": 0.2
}
},
{
"constant_score": {
"filter": {
"exists": {
"field": "description"
}
},
"boost": 0.1
}
}
]
}
},
"filter": {
"terms": {
"test_id": [
10
]
}
}
}
}
}
Result :
"hits": [
{
"_index": "test",
"_type": "data",
"_id": "2",
"_score": 1.3416407,
"_source": {
"description": "",
"test_id": 10
}
},
{
"_index": "test",
"_type": "data",
"_id": "1",
"_score": 0.44721356,
"_source": {
"description": "a",
"test_id": 10
}
},
{
"_index": "test",
"_type": "data",
"_id": "3",
"_score": 0.44721356,
"_source": {
"description": "hello",
"test_id": 10
}
}
]