我在嵌套对象上执行构面搜索时遇到问题。
举例来说,我有以下文件:
tags: [
{
tag: "tag0",
tag_url: "http://xxxxxxx.com/tag/tag0/"
},
{
tag: "tag1",
tag_url: "http://xxxxxx.com/tag/tag1/"
}
],
categories: [
{
category: "cat0",
category_url: "http://xxxxxx.com/category/cat0/"
},
{
category: "cat1",
category_url: "http://xxxxxx.com/category/cat1/"
}
],
我想在tags.tag
和tags.tag_url
所以我使用什么映射来为嵌套字段创建index:not_analyzed
?
我试过这个映射:
mapping_data[mapping_name]["properties"] = {
"tags.tag" : {
"type": "multi_field",
"fields" : {
"tags.tag": {"type" : "string", "index" : "analyzed", "store": "yes"},
"untouched" : {"type" : "string", "index" : "not_analyzed"}
}
},
"tags.tag_url" : {
"type": "multi_field",
"fields" : {
"tags.tag_url": {"type" : "string", "index" : "analyzed", "store": "yes"},
"untouched" : {"type" : "string", "index" : "not_analyzed"}
}
},
"categories.category" : {
"type": "multi_field",
"fields" : {
"categories.category": {"type" : "string", "index" : "analyzed", "store": "yes"},
"untouched" : {"type" : "string", "index" : "not_analyzed"}
}
},
"categories.category_url" : {
"type": "multi_field",
"fields" : {
"categories.category_url": {"type" : "string", "index" : "analyzed", "store": "yes"},
"untouched" : {"type" : "string", "index" : "not_analyzed"}
}
},
}
和
mapping_data[mapping_name]["properties"] = {
"tags" : {
"type": "nested"
},
"categories" : {
"type": "nested"
},
}
但它没有给我所需的结果。
使用type:nested
仍然会对嵌套字段进行标记,而type: multi_field
无法表达,嵌套字段为not_analyzed
。 (请注意,我在tags.tag
变体中使用了multi_field
,但无济于事。)
那么,如何表达映射以实现嵌套文档的方面?
PS:http://www.elasticsearch.org/guide/reference/mapping/nested-type/和http://www.elasticsearch.org/guide/reference/mapping/nested-type/没有产生我需要的结果,因为我没有value_field。
答案 0 :(得分:5)
以下是您应该用于tags
嵌套字段的json映射:
{
"type" : {
"properties" : {
"tags" : {
"type": "nested",
"properties" : {
"tag" : {
"type": "multi_field",
"fields" : {
"tag": {"type" : "string", "index" : "analyzed", "store": "yes"},
"untouched" : {"type" : "string", "index" : "not_analyzed"}
}
},
"tag_url" : {
"type": "multi_field",
"fields" : {
"tag_url": {"type" : "string", "index" : "analyzed", "store": "yes"},
"untouched" : {"type" : "string", "index" : "not_analyzed"}
}
}
}
}
}
}
}
在你的案例multi_field
中定义一个包含属性的嵌套对象是完全没错的。
然后,您可以在tags.untouched
字段上创建所需的方面,如下所示:
{
"query" : {
"match_all" : {}
},
"facets": {
"tags": {
"terms": {
"field": "tags.tag.untouched",
"size": 10
},
"nested" : "tags"
}
}
}
我使用最新版本的elasticsearch进行了测试。请记住,嵌套构面的方式自0.90以来已发生变化。请查看this issue以了解详情。