[英]how to search child documents with the same parent id in Elasticsearch on ver_6.2.4?
I read answers in how to search child documents with the same parent id in Elasticsearch? 我阅读了有关如何在Elasticsearch中搜索具有相同父ID的子文档的答案? , but none of them can solve it on 6.2.4, can someone tell me how to do the same job on 6.2.4?
,但是他们都无法在6.2.4上解决它,有人可以告诉我如何在6.2.4上完成相同的工作吗?
Starting in Elasticsearch 6.x, storing parent/child as separate types was replaced with a join
datatype . 从Elasticsearch 6.x开始,将父/子作为单独类型存储已替换为
join
数据类型 。 This doesn't fundamentally change how you'd go about indexing and querying those documents, but does change the syntax a bit. 这从根本上不会改变索引和查询这些文档的方式,但是会稍微改变语法。
NOTE: This set of changes were made in preparation for removal of type
entirely, which happens in 7.x 注意:这组更改是为完全删除
type
而准备的,这在7.x中发生
Instead of specifying separate types, we'll create a join
field named branch_join
for all documents. 除了指定不同的类型,我们将创建一个
join
指定字段branch_join
的所有文件。 The relations
configuration specifies the parent -> child relationship, with the key ( branch
) being the parent, and the value ( employee
) being the child. relations
配置指定了父级->子级关系,键( branch
)为父级,值( employee
)为子级。
NOTE: I'm using the index named organization
for sake of example 注意:为了示例,我使用名为
organization
的索引
PUT _template/org_template
{
"index_patterns": ["organization"],
"settings": {
"number_of_shards": 2
},
"mappings": {
"_doc": {
"properties": {
"branch_join": {
"type": "join",
"relations": {
"branch": "employee"
}
}
}
}
}
}
Indexing the parent documents is similar, but we need to specify which side of the relation each document is on by specifying branch
in the branch_join
field. 索引父文档是相似的,但是我们需要通过在
branch_join
字段中指定branch
来指定每个文档位于关系的哪一侧。
POST /organization/_doc/_bulk
{"index": {"_id": "london"}}
{"name": "London Westminster", "city": "London", "country": "UK", "branch_join": {"name":"branch"}}
{"index": {"_id": "liverpool"}}
{"name": "Liverpool Central", "city": "Liverpool", "country": "UK", "branch_join": {"name":"branch"}}
{"index": {"_id": "paris"}}
{"name": "Champs Élysées", "city": "Paris", "country": "France", "branch_join": {"name":"branch"}}
To index the children, we need to do two things: 1. We need to specify the branch_join
field again, but not only do we specify which side of the join this is ( employee
), we also need to specify the _id
of the parent documents to join on. 要为子级建立索引,我们需要做两件事:1.我们需要再次指定
branch_join
字段,不仅要指定连接的哪一侧是( employee
),还需要指定父级的_id
要加入的文件。 2. To ensure that children get indexed on the same shards as their parents, we'll set the routing
parameter equal to the _id
of the parent document. 2.为了确保子代与父代在同一分片上建立索引,我们将
routing
参数设置为等于父代文档的_id
。
POST /organization/_doc/_bulk
{"index": { "_id": 1, "routing": "london"}}
{"name": "Alice Smith", "dob": "1970-10-24", "hobby": "hiking", "branch_join": {"name":"employee", "parent": "london"}}
{"index": { "_id": 2, "routing": "london"}}
{"name": "Mark Thomas", "dob": "1982-05-16", "hobby": "diving", "branch_join": {"name":"employee", "parent": "london"}}
{"index": { "_id": 3, "routing": "liverpool"}}
{"name": "Barry Smith", "dob": "1979-04-01", "hobby": "hiking", "branch_join": {"name":"employee", "parent": "liverpool"}}
{"index": { "_id": 4, "routing": "paris"}}
{"name": "Adrien Grand", "dob": "1987-05-11", "hobby": "horses", "branch_join": {"name":"employee", "parent": "paris"}}
The query is almost identical, except that type
has been renamed parent_type
to be more explicit: 该查询几乎是相同的,只是
type
已更名为parent_type
以便更明确:
POST /organization/_search
{
"query": {
"has_parent": {
"parent_type": "branch",
"query": {
"ids": {
"values" : ["london"]
}
}
}
}
}
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