说我有这个文件:
{
"_index": "food",
"_type": "recipes",
"_id": "AU2LjsMLOuShTUj_LBrT",
"_score": 1,
"_source": {
"name": "granola bars",
"ingredients": [
{
"name": "butter",
"quantity": 4
},
{
"name": "granola",
"quantity": 6
}
]
}
}
使用以下过滤器可以很好地匹配此文档:
POST /food/recipes/_search
{
"query": {
"filtered": {
"query": {
"match_all": { }
},
"filter": {
"nested": {
"path": "ingredients",
"filter": {
"bool": {
"must": [
{
"terms": {
"ingredients.name": [
"butter",
"granola"
]
}
}
]
}
}
}
}
}
}
}
然而,它也会与具有其他成分的文件相匹配 我如何查询,以便它只匹配仅含有黄油和格兰诺拉麦片成分的文件?
答案 0 :(得分:1)
你需要一个“双重否定”。您希望匹配具有与您的查询匹配的嵌套文档的父文档,以及与您的查询不匹配的嵌套文档。
测试我设置了以下索引:
PUT /test_index
{
"settings": {
"number_of_shards": 1
},
"mappings": {
"doc": {
"properties": {
"ingredients": {
"type": "nested",
"properties": {
"name": {
"type": "string"
},
"quantity": {
"type": "long"
}
}
},
"name": {
"type": "string"
}
}
}
}
}
并添加了这两个文件:
PUT /test_index/doc/1
{
"name": "granola bars",
"ingredients": [
{
"name": "butter",
"quantity": 4
},
{
"name": "granola",
"quantity": 6
}
]
}
PUT /test_index/doc/2
{
"name": "granola cookies",
"ingredients": [
{
"name": "butter",
"quantity": 5
},
{
"name": "granola",
"quantity": 7
},
{
"name": "milk",
"quantity": 2
},
{
"name": "sugar",
"quantity": 7
}
]
}
您的查询将返回两个文档。出于这个问题的目的,为了使其更容易理解,我首先简化了您的查询:
POST /test_index/doc/_search
{
"query": {
"filtered": {
"query": {
"match_all": {}
},
"filter": {
"nested": {
"path": "ingredients",
"filter": {
"terms": {
"ingredients.name": [
"butter",
"granola"
]
}
}
}
}
}
}
}
然后我添加了一个外部"bool"
和两个"nested"
过滤器。一个是您最初在"must"
内部使用的过滤器,第二个是与您拥有的过滤器相反(因此它将匹配不包含这些术语的嵌套文档),在"must_not"
内: / p>
POST /test_index/doc/_search
{
"query": {
"filtered": {
"query": {
"match_all": {}
},
"filter": {
"bool": {
"must": [
{
"nested": {
"path": "ingredients",
"filter": {
"terms": {
"ingredients.name": [
"butter",
"granola"
]
}
}
}
}
],
"must_not": [
{
"nested": {
"path": "ingredients",
"filter": {
"not": {
"filter": {
"terms": {
"ingredients.name": [
"butter",
"granola"
]
}
}
}
}
}
}
]
}
}
}
}
}
这只返回一个doc:
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"failed": 0
},
"hits": {
"total": 1,
"max_score": 1,
"hits": [
{
"_index": "test_index",
"_type": "doc",
"_id": "1",
"_score": 1,
"_source": {
"name": "granola bars",
"ingredients": [
{
"name": "butter",
"quantity": 4
},
{
"name": "granola",
"quantity": 6
}
]
}
}
]
}
}
以下是我用来测试它的所有代码:
http://sense.qbox.io/gist/e5fd0c35070fb329d40ad342b3198695e6f52d3a